1 /* 2 * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "interpreter/interpreter.hpp" 27 #include "interpreter/interpreterRuntime.hpp" 28 #include "interpreter/templateTable.hpp" 29 #include "memory/universe.inline.hpp" 30 #include "oops/methodDataOop.hpp" 31 #include "oops/objArrayKlass.hpp" 32 #include "oops/oop.inline.hpp" 33 #include "prims/methodHandles.hpp" 34 #include "runtime/sharedRuntime.hpp" 35 #include "runtime/stubRoutines.hpp" 36 #include "runtime/synchronizer.hpp" 37 38 #ifndef CC_INTERP 39 40 #define __ _masm-> 41 42 // Platform-dependent initialization 43 44 void TemplateTable::pd_initialize() { 45 // No amd64 specific initialization 46 } 47 48 // Address computation: local variables 49 50 static inline Address iaddress(int n) { 51 return Address(r14, Interpreter::local_offset_in_bytes(n)); 52 } 53 54 static inline Address laddress(int n) { 55 return iaddress(n + 1); 56 } 57 58 static inline Address faddress(int n) { 59 return iaddress(n); 60 } 61 62 static inline Address daddress(int n) { 63 return laddress(n); 64 } 65 66 static inline Address aaddress(int n) { 67 return iaddress(n); 68 } 69 70 static inline Address iaddress(Register r) { 71 return Address(r14, r, Address::times_8); 72 } 73 74 static inline Address laddress(Register r) { 75 return Address(r14, r, Address::times_8, Interpreter::local_offset_in_bytes(1)); 76 } 77 78 static inline Address faddress(Register r) { 79 return iaddress(r); 80 } 81 82 static inline Address daddress(Register r) { 83 return laddress(r); 84 } 85 86 static inline Address aaddress(Register r) { 87 return iaddress(r); 88 } 89 90 static inline Address at_rsp() { 91 return Address(rsp, 0); 92 } 93 94 // At top of Java expression stack which may be different than esp(). It 95 // isn't for category 1 objects. 96 static inline Address at_tos () { 97 return Address(rsp, Interpreter::expr_offset_in_bytes(0)); 98 } 99 100 static inline Address at_tos_p1() { 101 return Address(rsp, Interpreter::expr_offset_in_bytes(1)); 102 } 103 104 static inline Address at_tos_p2() { 105 return Address(rsp, Interpreter::expr_offset_in_bytes(2)); 106 } 107 108 static inline Address at_tos_p3() { 109 return Address(rsp, Interpreter::expr_offset_in_bytes(3)); 110 } 111 112 // Condition conversion 113 static Assembler::Condition j_not(TemplateTable::Condition cc) { 114 switch (cc) { 115 case TemplateTable::equal : return Assembler::notEqual; 116 case TemplateTable::not_equal : return Assembler::equal; 117 case TemplateTable::less : return Assembler::greaterEqual; 118 case TemplateTable::less_equal : return Assembler::greater; 119 case TemplateTable::greater : return Assembler::lessEqual; 120 case TemplateTable::greater_equal: return Assembler::less; 121 } 122 ShouldNotReachHere(); 123 return Assembler::zero; 124 } 125 126 127 // Miscelaneous helper routines 128 // Store an oop (or NULL) at the address described by obj. 129 // If val == noreg this means store a NULL 130 131 static void do_oop_store(InterpreterMacroAssembler* _masm, 132 Address obj, 133 Register val, 134 BarrierSet::Name barrier, 135 bool precise) { 136 assert(val == noreg || val == rax, "parameter is just for looks"); 137 switch (barrier) { 138 #ifndef SERIALGC 139 case BarrierSet::G1SATBCT: 140 case BarrierSet::G1SATBCTLogging: 141 { 142 // flatten object address if needed 143 if (obj.index() == noreg && obj.disp() == 0) { 144 if (obj.base() != rdx) { 145 __ movq(rdx, obj.base()); 146 } 147 } else { 148 __ leaq(rdx, obj); 149 } 150 __ g1_write_barrier_pre(rdx /* obj */, 151 rbx /* pre_val */, 152 r15_thread /* thread */, 153 r8 /* tmp */, 154 val != noreg /* tosca_live */, 155 false /* expand_call */); 156 if (val == noreg) { 157 __ store_heap_oop_null(Address(rdx, 0)); 158 } else { 159 __ store_heap_oop(Address(rdx, 0), val); 160 __ g1_write_barrier_post(rdx /* store_adr */, 161 val /* new_val */, 162 r15_thread /* thread */, 163 r8 /* tmp */, 164 rbx /* tmp2 */); 165 } 166 167 } 168 break; 169 #endif // SERIALGC 170 case BarrierSet::CardTableModRef: 171 case BarrierSet::CardTableExtension: 172 { 173 if (val == noreg) { 174 __ store_heap_oop_null(obj); 175 } else { 176 __ store_heap_oop(obj, val); 177 // flatten object address if needed 178 if (!precise || (obj.index() == noreg && obj.disp() == 0)) { 179 __ store_check(obj.base()); 180 } else { 181 __ leaq(rdx, obj); 182 __ store_check(rdx); 183 } 184 } 185 } 186 break; 187 case BarrierSet::ModRef: 188 case BarrierSet::Other: 189 if (val == noreg) { 190 __ store_heap_oop_null(obj); 191 } else { 192 __ store_heap_oop(obj, val); 193 } 194 break; 195 default : 196 ShouldNotReachHere(); 197 198 } 199 } 200 201 Address TemplateTable::at_bcp(int offset) { 202 assert(_desc->uses_bcp(), "inconsistent uses_bcp information"); 203 return Address(r13, offset); 204 } 205 206 void TemplateTable::patch_bytecode(Bytecodes::Code bc, Register bc_reg, 207 Register temp_reg, bool load_bc_into_bc_reg/*=true*/, 208 int byte_no) { 209 if (!RewriteBytecodes) return; 210 Label L_patch_done; 211 212 switch (bc) { 213 case Bytecodes::_fast_aputfield: 214 case Bytecodes::_fast_bputfield: 215 case Bytecodes::_fast_cputfield: 216 case Bytecodes::_fast_dputfield: 217 case Bytecodes::_fast_fputfield: 218 case Bytecodes::_fast_iputfield: 219 case Bytecodes::_fast_lputfield: 220 case Bytecodes::_fast_sputfield: 221 { 222 // We skip bytecode quickening for putfield instructions when 223 // the put_code written to the constant pool cache is zero. 224 // This is required so that every execution of this instruction 225 // calls out to InterpreterRuntime::resolve_get_put to do 226 // additional, required work. 227 assert(byte_no == f1_byte || byte_no == f2_byte, "byte_no out of range"); 228 assert(load_bc_into_bc_reg, "we use bc_reg as temp"); 229 __ get_cache_and_index_and_bytecode_at_bcp(temp_reg, bc_reg, temp_reg, byte_no, 1); 230 __ movl(bc_reg, bc); 231 __ cmpl(temp_reg, (int) 0); 232 __ jcc(Assembler::zero, L_patch_done); // don't patch 233 } 234 break; 235 default: 236 assert(byte_no == -1, "sanity"); 237 // the pair bytecodes have already done the load. 238 if (load_bc_into_bc_reg) { 239 __ movl(bc_reg, bc); 240 } 241 } 242 243 if (JvmtiExport::can_post_breakpoint()) { 244 Label L_fast_patch; 245 // if a breakpoint is present we can't rewrite the stream directly 246 __ movzbl(temp_reg, at_bcp(0)); 247 __ cmpl(temp_reg, Bytecodes::_breakpoint); 248 __ jcc(Assembler::notEqual, L_fast_patch); 249 __ get_method(temp_reg); 250 // Let breakpoint table handling rewrite to quicker bytecode 251 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::set_original_bytecode_at), temp_reg, r13, bc_reg); 252 #ifndef ASSERT 253 __ jmpb(L_patch_done); 254 #else 255 __ jmp(L_patch_done); 256 #endif 257 __ bind(L_fast_patch); 258 } 259 260 #ifdef ASSERT 261 Label L_okay; 262 __ load_unsigned_byte(temp_reg, at_bcp(0)); 263 __ cmpl(temp_reg, (int) Bytecodes::java_code(bc)); 264 __ jcc(Assembler::equal, L_okay); 265 __ cmpl(temp_reg, bc_reg); 266 __ jcc(Assembler::equal, L_okay); 267 __ stop("patching the wrong bytecode"); 268 __ bind(L_okay); 269 #endif 270 271 // patch bytecode 272 __ movb(at_bcp(0), bc_reg); 273 __ bind(L_patch_done); 274 } 275 276 277 // Individual instructions 278 279 void TemplateTable::nop() { 280 transition(vtos, vtos); 281 // nothing to do 282 } 283 284 void TemplateTable::shouldnotreachhere() { 285 transition(vtos, vtos); 286 __ stop("shouldnotreachhere bytecode"); 287 } 288 289 void TemplateTable::aconst_null() { 290 transition(vtos, atos); 291 __ xorl(rax, rax); 292 } 293 294 void TemplateTable::iconst(int value) { 295 transition(vtos, itos); 296 if (value == 0) { 297 __ xorl(rax, rax); 298 } else { 299 __ movl(rax, value); 300 } 301 } 302 303 void TemplateTable::lconst(int value) { 304 transition(vtos, ltos); 305 if (value == 0) { 306 __ xorl(rax, rax); 307 } else { 308 __ movl(rax, value); 309 } 310 } 311 312 void TemplateTable::fconst(int value) { 313 transition(vtos, ftos); 314 static float one = 1.0f, two = 2.0f; 315 switch (value) { 316 case 0: 317 __ xorps(xmm0, xmm0); 318 break; 319 case 1: 320 __ movflt(xmm0, ExternalAddress((address) &one)); 321 break; 322 case 2: 323 __ movflt(xmm0, ExternalAddress((address) &two)); 324 break; 325 default: 326 ShouldNotReachHere(); 327 break; 328 } 329 } 330 331 void TemplateTable::dconst(int value) { 332 transition(vtos, dtos); 333 static double one = 1.0; 334 switch (value) { 335 case 0: 336 __ xorpd(xmm0, xmm0); 337 break; 338 case 1: 339 __ movdbl(xmm0, ExternalAddress((address) &one)); 340 break; 341 default: 342 ShouldNotReachHere(); 343 break; 344 } 345 } 346 347 void TemplateTable::bipush() { 348 transition(vtos, itos); 349 __ load_signed_byte(rax, at_bcp(1)); 350 } 351 352 void TemplateTable::sipush() { 353 transition(vtos, itos); 354 __ load_unsigned_short(rax, at_bcp(1)); 355 __ bswapl(rax); 356 __ sarl(rax, 16); 357 } 358 359 void TemplateTable::ldc(bool wide) { 360 transition(vtos, vtos); 361 Label call_ldc, notFloat, notClass, Done; 362 363 if (wide) { 364 __ get_unsigned_2_byte_index_at_bcp(rbx, 1); 365 } else { 366 __ load_unsigned_byte(rbx, at_bcp(1)); 367 } 368 369 __ get_cpool_and_tags(rcx, rax); 370 const int base_offset = constantPoolOopDesc::header_size() * wordSize; 371 const int tags_offset = typeArrayOopDesc::header_size(T_BYTE) * wordSize; 372 373 // get type 374 __ movzbl(rdx, Address(rax, rbx, Address::times_1, tags_offset)); 375 376 // unresolved string - get the resolved string 377 __ cmpl(rdx, JVM_CONSTANT_UnresolvedString); 378 __ jccb(Assembler::equal, call_ldc); 379 380 // unresolved class - get the resolved class 381 __ cmpl(rdx, JVM_CONSTANT_UnresolvedClass); 382 __ jccb(Assembler::equal, call_ldc); 383 384 // unresolved class in error state - call into runtime to throw the error 385 // from the first resolution attempt 386 __ cmpl(rdx, JVM_CONSTANT_UnresolvedClassInError); 387 __ jccb(Assembler::equal, call_ldc); 388 389 // resolved class - need to call vm to get java mirror of the class 390 __ cmpl(rdx, JVM_CONSTANT_Class); 391 __ jcc(Assembler::notEqual, notClass); 392 393 __ bind(call_ldc); 394 __ movl(c_rarg1, wide); 395 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::ldc), c_rarg1); 396 __ push_ptr(rax); 397 __ verify_oop(rax); 398 __ jmp(Done); 399 400 __ bind(notClass); 401 __ cmpl(rdx, JVM_CONSTANT_Float); 402 __ jccb(Assembler::notEqual, notFloat); 403 // ftos 404 __ movflt(xmm0, Address(rcx, rbx, Address::times_8, base_offset)); 405 __ push_f(); 406 __ jmp(Done); 407 408 __ bind(notFloat); 409 #ifdef ASSERT 410 { 411 Label L; 412 __ cmpl(rdx, JVM_CONSTANT_Integer); 413 __ jcc(Assembler::equal, L); 414 __ cmpl(rdx, JVM_CONSTANT_String); 415 __ jcc(Assembler::equal, L); 416 __ cmpl(rdx, JVM_CONSTANT_Object); 417 __ jcc(Assembler::equal, L); 418 __ stop("unexpected tag type in ldc"); 419 __ bind(L); 420 } 421 #endif 422 // atos and itos 423 Label isOop; 424 __ cmpl(rdx, JVM_CONSTANT_Integer); 425 __ jcc(Assembler::notEqual, isOop); 426 __ movl(rax, Address(rcx, rbx, Address::times_8, base_offset)); 427 __ push_i(rax); 428 __ jmp(Done); 429 430 __ bind(isOop); 431 __ movptr(rax, Address(rcx, rbx, Address::times_8, base_offset)); 432 __ push_ptr(rax); 433 434 if (VerifyOops) { 435 __ verify_oop(rax); 436 } 437 438 __ bind(Done); 439 } 440 441 // Fast path for caching oop constants. 442 // %%% We should use this to handle Class and String constants also. 443 // %%% It will simplify the ldc/primitive path considerably. 444 void TemplateTable::fast_aldc(bool wide) { 445 transition(vtos, atos); 446 447 if (!EnableInvokeDynamic) { 448 // We should not encounter this bytecode if !EnableInvokeDynamic. 449 // The verifier will stop it. However, if we get past the verifier, 450 // this will stop the thread in a reasonable way, without crashing the JVM. 451 __ call_VM(noreg, CAST_FROM_FN_PTR(address, 452 InterpreterRuntime::throw_IncompatibleClassChangeError)); 453 // the call_VM checks for exception, so we should never return here. 454 __ should_not_reach_here(); 455 return; 456 } 457 458 const Register cache = rcx; 459 const Register index = rdx; 460 461 resolve_cache_and_index(f1_oop, rax, cache, index, wide ? sizeof(u2) : sizeof(u1)); 462 if (VerifyOops) { 463 __ verify_oop(rax); 464 } 465 466 Label L_done, L_throw_exception; 467 const Register con_klass_temp = rcx; // same as cache 468 const Register array_klass_temp = rdx; // same as index 469 __ load_klass(con_klass_temp, rax); 470 __ lea(array_klass_temp, ExternalAddress((address)Universe::systemObjArrayKlassObj_addr())); 471 __ cmpptr(con_klass_temp, Address(array_klass_temp, 0)); 472 __ jcc(Assembler::notEqual, L_done); 473 __ cmpl(Address(rax, arrayOopDesc::length_offset_in_bytes()), 0); 474 __ jcc(Assembler::notEqual, L_throw_exception); 475 __ xorptr(rax, rax); 476 __ jmp(L_done); 477 478 // Load the exception from the system-array which wraps it: 479 __ bind(L_throw_exception); 480 __ load_heap_oop(rax, Address(rax, arrayOopDesc::base_offset_in_bytes(T_OBJECT))); 481 __ jump(ExternalAddress(Interpreter::throw_exception_entry())); 482 483 __ bind(L_done); 484 } 485 486 void TemplateTable::ldc2_w() { 487 transition(vtos, vtos); 488 Label Long, Done; 489 __ get_unsigned_2_byte_index_at_bcp(rbx, 1); 490 491 __ get_cpool_and_tags(rcx, rax); 492 const int base_offset = constantPoolOopDesc::header_size() * wordSize; 493 const int tags_offset = typeArrayOopDesc::header_size(T_BYTE) * wordSize; 494 495 // get type 496 __ cmpb(Address(rax, rbx, Address::times_1, tags_offset), 497 JVM_CONSTANT_Double); 498 __ jccb(Assembler::notEqual, Long); 499 // dtos 500 __ movdbl(xmm0, Address(rcx, rbx, Address::times_8, base_offset)); 501 __ push_d(); 502 __ jmpb(Done); 503 504 __ bind(Long); 505 // ltos 506 __ movq(rax, Address(rcx, rbx, Address::times_8, base_offset)); 507 __ push_l(); 508 509 __ bind(Done); 510 } 511 512 void TemplateTable::locals_index(Register reg, int offset) { 513 __ load_unsigned_byte(reg, at_bcp(offset)); 514 __ negptr(reg); 515 } 516 517 void TemplateTable::iload() { 518 transition(vtos, itos); 519 if (RewriteFrequentPairs) { 520 Label rewrite, done; 521 const Register bc = c_rarg3; 522 assert(rbx != bc, "register damaged"); 523 524 // get next byte 525 __ load_unsigned_byte(rbx, 526 at_bcp(Bytecodes::length_for(Bytecodes::_iload))); 527 // if _iload, wait to rewrite to iload2. We only want to rewrite the 528 // last two iloads in a pair. Comparing against fast_iload means that 529 // the next bytecode is neither an iload or a caload, and therefore 530 // an iload pair. 531 __ cmpl(rbx, Bytecodes::_iload); 532 __ jcc(Assembler::equal, done); 533 534 __ cmpl(rbx, Bytecodes::_fast_iload); 535 __ movl(bc, Bytecodes::_fast_iload2); 536 __ jccb(Assembler::equal, rewrite); 537 538 // if _caload, rewrite to fast_icaload 539 __ cmpl(rbx, Bytecodes::_caload); 540 __ movl(bc, Bytecodes::_fast_icaload); 541 __ jccb(Assembler::equal, rewrite); 542 543 // rewrite so iload doesn't check again. 544 __ movl(bc, Bytecodes::_fast_iload); 545 546 // rewrite 547 // bc: fast bytecode 548 __ bind(rewrite); 549 patch_bytecode(Bytecodes::_iload, bc, rbx, false); 550 __ bind(done); 551 } 552 553 // Get the local value into tos 554 locals_index(rbx); 555 __ movl(rax, iaddress(rbx)); 556 } 557 558 void TemplateTable::fast_iload2() { 559 transition(vtos, itos); 560 locals_index(rbx); 561 __ movl(rax, iaddress(rbx)); 562 __ push(itos); 563 locals_index(rbx, 3); 564 __ movl(rax, iaddress(rbx)); 565 } 566 567 void TemplateTable::fast_iload() { 568 transition(vtos, itos); 569 locals_index(rbx); 570 __ movl(rax, iaddress(rbx)); 571 } 572 573 void TemplateTable::lload() { 574 transition(vtos, ltos); 575 locals_index(rbx); 576 __ movq(rax, laddress(rbx)); 577 } 578 579 void TemplateTable::fload() { 580 transition(vtos, ftos); 581 locals_index(rbx); 582 __ movflt(xmm0, faddress(rbx)); 583 } 584 585 void TemplateTable::dload() { 586 transition(vtos, dtos); 587 locals_index(rbx); 588 __ movdbl(xmm0, daddress(rbx)); 589 } 590 591 void TemplateTable::aload() { 592 transition(vtos, atos); 593 locals_index(rbx); 594 __ movptr(rax, aaddress(rbx)); 595 } 596 597 void TemplateTable::locals_index_wide(Register reg) { 598 __ movl(reg, at_bcp(2)); 599 __ bswapl(reg); 600 __ shrl(reg, 16); 601 __ negptr(reg); 602 } 603 604 void TemplateTable::wide_iload() { 605 transition(vtos, itos); 606 locals_index_wide(rbx); 607 __ movl(rax, iaddress(rbx)); 608 } 609 610 void TemplateTable::wide_lload() { 611 transition(vtos, ltos); 612 locals_index_wide(rbx); 613 __ movq(rax, laddress(rbx)); 614 } 615 616 void TemplateTable::wide_fload() { 617 transition(vtos, ftos); 618 locals_index_wide(rbx); 619 __ movflt(xmm0, faddress(rbx)); 620 } 621 622 void TemplateTable::wide_dload() { 623 transition(vtos, dtos); 624 locals_index_wide(rbx); 625 __ movdbl(xmm0, daddress(rbx)); 626 } 627 628 void TemplateTable::wide_aload() { 629 transition(vtos, atos); 630 locals_index_wide(rbx); 631 __ movptr(rax, aaddress(rbx)); 632 } 633 634 void TemplateTable::index_check(Register array, Register index) { 635 // destroys rbx 636 // check array 637 __ null_check(array, arrayOopDesc::length_offset_in_bytes()); 638 // sign extend index for use by indexed load 639 __ movl2ptr(index, index); 640 // check index 641 __ cmpl(index, Address(array, arrayOopDesc::length_offset_in_bytes())); 642 if (index != rbx) { 643 // ??? convention: move aberrant index into ebx for exception message 644 assert(rbx != array, "different registers"); 645 __ movl(rbx, index); 646 } 647 __ jump_cc(Assembler::aboveEqual, 648 ExternalAddress(Interpreter::_throw_ArrayIndexOutOfBoundsException_entry)); 649 } 650 651 void TemplateTable::iaload() { 652 transition(itos, itos); 653 __ pop_ptr(rdx); 654 // eax: index 655 // rdx: array 656 index_check(rdx, rax); // kills rbx 657 __ movl(rax, Address(rdx, rax, 658 Address::times_4, 659 arrayOopDesc::base_offset_in_bytes(T_INT))); 660 } 661 662 void TemplateTable::laload() { 663 transition(itos, ltos); 664 __ pop_ptr(rdx); 665 // eax: index 666 // rdx: array 667 index_check(rdx, rax); // kills rbx 668 __ movq(rax, Address(rdx, rbx, 669 Address::times_8, 670 arrayOopDesc::base_offset_in_bytes(T_LONG))); 671 } 672 673 void TemplateTable::faload() { 674 transition(itos, ftos); 675 __ pop_ptr(rdx); 676 // eax: index 677 // rdx: array 678 index_check(rdx, rax); // kills rbx 679 __ movflt(xmm0, Address(rdx, rax, 680 Address::times_4, 681 arrayOopDesc::base_offset_in_bytes(T_FLOAT))); 682 } 683 684 void TemplateTable::daload() { 685 transition(itos, dtos); 686 __ pop_ptr(rdx); 687 // eax: index 688 // rdx: array 689 index_check(rdx, rax); // kills rbx 690 __ movdbl(xmm0, Address(rdx, rax, 691 Address::times_8, 692 arrayOopDesc::base_offset_in_bytes(T_DOUBLE))); 693 } 694 695 void TemplateTable::aaload() { 696 transition(itos, atos); 697 __ pop_ptr(rdx); 698 // eax: index 699 // rdx: array 700 index_check(rdx, rax); // kills rbx 701 __ load_heap_oop(rax, Address(rdx, rax, 702 UseCompressedOops ? Address::times_4 : Address::times_8, 703 arrayOopDesc::base_offset_in_bytes(T_OBJECT))); 704 } 705 706 void TemplateTable::baload() { 707 transition(itos, itos); 708 __ pop_ptr(rdx); 709 // eax: index 710 // rdx: array 711 index_check(rdx, rax); // kills rbx 712 __ load_signed_byte(rax, 713 Address(rdx, rax, 714 Address::times_1, 715 arrayOopDesc::base_offset_in_bytes(T_BYTE))); 716 } 717 718 void TemplateTable::caload() { 719 transition(itos, itos); 720 __ pop_ptr(rdx); 721 // eax: index 722 // rdx: array 723 index_check(rdx, rax); // kills rbx 724 __ load_unsigned_short(rax, 725 Address(rdx, rax, 726 Address::times_2, 727 arrayOopDesc::base_offset_in_bytes(T_CHAR))); 728 } 729 730 // iload followed by caload frequent pair 731 void TemplateTable::fast_icaload() { 732 transition(vtos, itos); 733 // load index out of locals 734 locals_index(rbx); 735 __ movl(rax, iaddress(rbx)); 736 737 // eax: index 738 // rdx: array 739 __ pop_ptr(rdx); 740 index_check(rdx, rax); // kills rbx 741 __ load_unsigned_short(rax, 742 Address(rdx, rax, 743 Address::times_2, 744 arrayOopDesc::base_offset_in_bytes(T_CHAR))); 745 } 746 747 void TemplateTable::saload() { 748 transition(itos, itos); 749 __ pop_ptr(rdx); 750 // eax: index 751 // rdx: array 752 index_check(rdx, rax); // kills rbx 753 __ load_signed_short(rax, 754 Address(rdx, rax, 755 Address::times_2, 756 arrayOopDesc::base_offset_in_bytes(T_SHORT))); 757 } 758 759 void TemplateTable::iload(int n) { 760 transition(vtos, itos); 761 __ movl(rax, iaddress(n)); 762 } 763 764 void TemplateTable::lload(int n) { 765 transition(vtos, ltos); 766 __ movq(rax, laddress(n)); 767 } 768 769 void TemplateTable::fload(int n) { 770 transition(vtos, ftos); 771 __ movflt(xmm0, faddress(n)); 772 } 773 774 void TemplateTable::dload(int n) { 775 transition(vtos, dtos); 776 __ movdbl(xmm0, daddress(n)); 777 } 778 779 void TemplateTable::aload(int n) { 780 transition(vtos, atos); 781 __ movptr(rax, aaddress(n)); 782 } 783 784 void TemplateTable::aload_0() { 785 transition(vtos, atos); 786 // According to bytecode histograms, the pairs: 787 // 788 // _aload_0, _fast_igetfield 789 // _aload_0, _fast_agetfield 790 // _aload_0, _fast_fgetfield 791 // 792 // occur frequently. If RewriteFrequentPairs is set, the (slow) 793 // _aload_0 bytecode checks if the next bytecode is either 794 // _fast_igetfield, _fast_agetfield or _fast_fgetfield and then 795 // rewrites the current bytecode into a pair bytecode; otherwise it 796 // rewrites the current bytecode into _fast_aload_0 that doesn't do 797 // the pair check anymore. 798 // 799 // Note: If the next bytecode is _getfield, the rewrite must be 800 // delayed, otherwise we may miss an opportunity for a pair. 801 // 802 // Also rewrite frequent pairs 803 // aload_0, aload_1 804 // aload_0, iload_1 805 // These bytecodes with a small amount of code are most profitable 806 // to rewrite 807 if (RewriteFrequentPairs) { 808 Label rewrite, done; 809 const Register bc = c_rarg3; 810 assert(rbx != bc, "register damaged"); 811 // get next byte 812 __ load_unsigned_byte(rbx, 813 at_bcp(Bytecodes::length_for(Bytecodes::_aload_0))); 814 815 // do actual aload_0 816 aload(0); 817 818 // if _getfield then wait with rewrite 819 __ cmpl(rbx, Bytecodes::_getfield); 820 __ jcc(Assembler::equal, done); 821 822 // if _igetfield then reqrite to _fast_iaccess_0 823 assert(Bytecodes::java_code(Bytecodes::_fast_iaccess_0) == 824 Bytecodes::_aload_0, 825 "fix bytecode definition"); 826 __ cmpl(rbx, Bytecodes::_fast_igetfield); 827 __ movl(bc, Bytecodes::_fast_iaccess_0); 828 __ jccb(Assembler::equal, rewrite); 829 830 // if _agetfield then reqrite to _fast_aaccess_0 831 assert(Bytecodes::java_code(Bytecodes::_fast_aaccess_0) == 832 Bytecodes::_aload_0, 833 "fix bytecode definition"); 834 __ cmpl(rbx, Bytecodes::_fast_agetfield); 835 __ movl(bc, Bytecodes::_fast_aaccess_0); 836 __ jccb(Assembler::equal, rewrite); 837 838 // if _fgetfield then reqrite to _fast_faccess_0 839 assert(Bytecodes::java_code(Bytecodes::_fast_faccess_0) == 840 Bytecodes::_aload_0, 841 "fix bytecode definition"); 842 __ cmpl(rbx, Bytecodes::_fast_fgetfield); 843 __ movl(bc, Bytecodes::_fast_faccess_0); 844 __ jccb(Assembler::equal, rewrite); 845 846 // else rewrite to _fast_aload0 847 assert(Bytecodes::java_code(Bytecodes::_fast_aload_0) == 848 Bytecodes::_aload_0, 849 "fix bytecode definition"); 850 __ movl(bc, Bytecodes::_fast_aload_0); 851 852 // rewrite 853 // bc: fast bytecode 854 __ bind(rewrite); 855 patch_bytecode(Bytecodes::_aload_0, bc, rbx, false); 856 857 __ bind(done); 858 } else { 859 aload(0); 860 } 861 } 862 863 void TemplateTable::istore() { 864 transition(itos, vtos); 865 locals_index(rbx); 866 __ movl(iaddress(rbx), rax); 867 } 868 869 void TemplateTable::lstore() { 870 transition(ltos, vtos); 871 locals_index(rbx); 872 __ movq(laddress(rbx), rax); 873 } 874 875 void TemplateTable::fstore() { 876 transition(ftos, vtos); 877 locals_index(rbx); 878 __ movflt(faddress(rbx), xmm0); 879 } 880 881 void TemplateTable::dstore() { 882 transition(dtos, vtos); 883 locals_index(rbx); 884 __ movdbl(daddress(rbx), xmm0); 885 } 886 887 void TemplateTable::astore() { 888 transition(vtos, vtos); 889 __ pop_ptr(rax); 890 locals_index(rbx); 891 __ movptr(aaddress(rbx), rax); 892 } 893 894 void TemplateTable::wide_istore() { 895 transition(vtos, vtos); 896 __ pop_i(); 897 locals_index_wide(rbx); 898 __ movl(iaddress(rbx), rax); 899 } 900 901 void TemplateTable::wide_lstore() { 902 transition(vtos, vtos); 903 __ pop_l(); 904 locals_index_wide(rbx); 905 __ movq(laddress(rbx), rax); 906 } 907 908 void TemplateTable::wide_fstore() { 909 transition(vtos, vtos); 910 __ pop_f(); 911 locals_index_wide(rbx); 912 __ movflt(faddress(rbx), xmm0); 913 } 914 915 void TemplateTable::wide_dstore() { 916 transition(vtos, vtos); 917 __ pop_d(); 918 locals_index_wide(rbx); 919 __ movdbl(daddress(rbx), xmm0); 920 } 921 922 void TemplateTable::wide_astore() { 923 transition(vtos, vtos); 924 __ pop_ptr(rax); 925 locals_index_wide(rbx); 926 __ movptr(aaddress(rbx), rax); 927 } 928 929 void TemplateTable::iastore() { 930 transition(itos, vtos); 931 __ pop_i(rbx); 932 __ pop_ptr(rdx); 933 // eax: value 934 // ebx: index 935 // rdx: array 936 index_check(rdx, rbx); // prefer index in ebx 937 __ movl(Address(rdx, rbx, 938 Address::times_4, 939 arrayOopDesc::base_offset_in_bytes(T_INT)), 940 rax); 941 } 942 943 void TemplateTable::lastore() { 944 transition(ltos, vtos); 945 __ pop_i(rbx); 946 __ pop_ptr(rdx); 947 // rax: value 948 // ebx: index 949 // rdx: array 950 index_check(rdx, rbx); // prefer index in ebx 951 __ movq(Address(rdx, rbx, 952 Address::times_8, 953 arrayOopDesc::base_offset_in_bytes(T_LONG)), 954 rax); 955 } 956 957 void TemplateTable::fastore() { 958 transition(ftos, vtos); 959 __ pop_i(rbx); 960 __ pop_ptr(rdx); 961 // xmm0: value 962 // ebx: index 963 // rdx: array 964 index_check(rdx, rbx); // prefer index in ebx 965 __ movflt(Address(rdx, rbx, 966 Address::times_4, 967 arrayOopDesc::base_offset_in_bytes(T_FLOAT)), 968 xmm0); 969 } 970 971 void TemplateTable::dastore() { 972 transition(dtos, vtos); 973 __ pop_i(rbx); 974 __ pop_ptr(rdx); 975 // xmm0: value 976 // ebx: index 977 // rdx: array 978 index_check(rdx, rbx); // prefer index in ebx 979 __ movdbl(Address(rdx, rbx, 980 Address::times_8, 981 arrayOopDesc::base_offset_in_bytes(T_DOUBLE)), 982 xmm0); 983 } 984 985 void TemplateTable::aastore() { 986 Label is_null, ok_is_subtype, done; 987 transition(vtos, vtos); 988 // stack: ..., array, index, value 989 __ movptr(rax, at_tos()); // value 990 __ movl(rcx, at_tos_p1()); // index 991 __ movptr(rdx, at_tos_p2()); // array 992 993 Address element_address(rdx, rcx, 994 UseCompressedOops? Address::times_4 : Address::times_8, 995 arrayOopDesc::base_offset_in_bytes(T_OBJECT)); 996 997 index_check(rdx, rcx); // kills rbx 998 // do array store check - check for NULL value first 999 __ testptr(rax, rax); 1000 __ jcc(Assembler::zero, is_null); 1001 1002 // Move subklass into rbx 1003 __ load_klass(rbx, rax); 1004 // Move superklass into rax 1005 __ load_klass(rax, rdx); 1006 __ movptr(rax, Address(rax, 1007 objArrayKlass::element_klass_offset())); 1008 // Compress array + index*oopSize + 12 into a single register. Frees rcx. 1009 __ lea(rdx, element_address); 1010 1011 // Generate subtype check. Blows rcx, rdi 1012 // Superklass in rax. Subklass in rbx. 1013 __ gen_subtype_check(rbx, ok_is_subtype); 1014 1015 // Come here on failure 1016 // object is at TOS 1017 __ jump(ExternalAddress(Interpreter::_throw_ArrayStoreException_entry)); 1018 1019 // Come here on success 1020 __ bind(ok_is_subtype); 1021 1022 // Get the value we will store 1023 __ movptr(rax, at_tos()); 1024 // Now store using the appropriate barrier 1025 do_oop_store(_masm, Address(rdx, 0), rax, _bs->kind(), true); 1026 __ jmp(done); 1027 1028 // Have a NULL in rax, rdx=array, ecx=index. Store NULL at ary[idx] 1029 __ bind(is_null); 1030 __ profile_null_seen(rbx); 1031 1032 // Store a NULL 1033 do_oop_store(_masm, element_address, noreg, _bs->kind(), true); 1034 1035 // Pop stack arguments 1036 __ bind(done); 1037 __ addptr(rsp, 3 * Interpreter::stackElementSize); 1038 } 1039 1040 void TemplateTable::bastore() { 1041 transition(itos, vtos); 1042 __ pop_i(rbx); 1043 __ pop_ptr(rdx); 1044 // eax: value 1045 // ebx: index 1046 // rdx: array 1047 index_check(rdx, rbx); // prefer index in ebx 1048 __ movb(Address(rdx, rbx, 1049 Address::times_1, 1050 arrayOopDesc::base_offset_in_bytes(T_BYTE)), 1051 rax); 1052 } 1053 1054 void TemplateTable::castore() { 1055 transition(itos, vtos); 1056 __ pop_i(rbx); 1057 __ pop_ptr(rdx); 1058 // eax: value 1059 // ebx: index 1060 // rdx: array 1061 index_check(rdx, rbx); // prefer index in ebx 1062 __ movw(Address(rdx, rbx, 1063 Address::times_2, 1064 arrayOopDesc::base_offset_in_bytes(T_CHAR)), 1065 rax); 1066 } 1067 1068 void TemplateTable::sastore() { 1069 castore(); 1070 } 1071 1072 void TemplateTable::istore(int n) { 1073 transition(itos, vtos); 1074 __ movl(iaddress(n), rax); 1075 } 1076 1077 void TemplateTable::lstore(int n) { 1078 transition(ltos, vtos); 1079 __ movq(laddress(n), rax); 1080 } 1081 1082 void TemplateTable::fstore(int n) { 1083 transition(ftos, vtos); 1084 __ movflt(faddress(n), xmm0); 1085 } 1086 1087 void TemplateTable::dstore(int n) { 1088 transition(dtos, vtos); 1089 __ movdbl(daddress(n), xmm0); 1090 } 1091 1092 void TemplateTable::astore(int n) { 1093 transition(vtos, vtos); 1094 __ pop_ptr(rax); 1095 __ movptr(aaddress(n), rax); 1096 } 1097 1098 void TemplateTable::pop() { 1099 transition(vtos, vtos); 1100 __ addptr(rsp, Interpreter::stackElementSize); 1101 } 1102 1103 void TemplateTable::pop2() { 1104 transition(vtos, vtos); 1105 __ addptr(rsp, 2 * Interpreter::stackElementSize); 1106 } 1107 1108 void TemplateTable::dup() { 1109 transition(vtos, vtos); 1110 __ load_ptr(0, rax); 1111 __ push_ptr(rax); 1112 // stack: ..., a, a 1113 } 1114 1115 void TemplateTable::dup_x1() { 1116 transition(vtos, vtos); 1117 // stack: ..., a, b 1118 __ load_ptr( 0, rax); // load b 1119 __ load_ptr( 1, rcx); // load a 1120 __ store_ptr(1, rax); // store b 1121 __ store_ptr(0, rcx); // store a 1122 __ push_ptr(rax); // push b 1123 // stack: ..., b, a, b 1124 } 1125 1126 void TemplateTable::dup_x2() { 1127 transition(vtos, vtos); 1128 // stack: ..., a, b, c 1129 __ load_ptr( 0, rax); // load c 1130 __ load_ptr( 2, rcx); // load a 1131 __ store_ptr(2, rax); // store c in a 1132 __ push_ptr(rax); // push c 1133 // stack: ..., c, b, c, c 1134 __ load_ptr( 2, rax); // load b 1135 __ store_ptr(2, rcx); // store a in b 1136 // stack: ..., c, a, c, c 1137 __ store_ptr(1, rax); // store b in c 1138 // stack: ..., c, a, b, c 1139 } 1140 1141 void TemplateTable::dup2() { 1142 transition(vtos, vtos); 1143 // stack: ..., a, b 1144 __ load_ptr(1, rax); // load a 1145 __ push_ptr(rax); // push a 1146 __ load_ptr(1, rax); // load b 1147 __ push_ptr(rax); // push b 1148 // stack: ..., a, b, a, b 1149 } 1150 1151 void TemplateTable::dup2_x1() { 1152 transition(vtos, vtos); 1153 // stack: ..., a, b, c 1154 __ load_ptr( 0, rcx); // load c 1155 __ load_ptr( 1, rax); // load b 1156 __ push_ptr(rax); // push b 1157 __ push_ptr(rcx); // push c 1158 // stack: ..., a, b, c, b, c 1159 __ store_ptr(3, rcx); // store c in b 1160 // stack: ..., a, c, c, b, c 1161 __ load_ptr( 4, rcx); // load a 1162 __ store_ptr(2, rcx); // store a in 2nd c 1163 // stack: ..., a, c, a, b, c 1164 __ store_ptr(4, rax); // store b in a 1165 // stack: ..., b, c, a, b, c 1166 } 1167 1168 void TemplateTable::dup2_x2() { 1169 transition(vtos, vtos); 1170 // stack: ..., a, b, c, d 1171 __ load_ptr( 0, rcx); // load d 1172 __ load_ptr( 1, rax); // load c 1173 __ push_ptr(rax); // push c 1174 __ push_ptr(rcx); // push d 1175 // stack: ..., a, b, c, d, c, d 1176 __ load_ptr( 4, rax); // load b 1177 __ store_ptr(2, rax); // store b in d 1178 __ store_ptr(4, rcx); // store d in b 1179 // stack: ..., a, d, c, b, c, d 1180 __ load_ptr( 5, rcx); // load a 1181 __ load_ptr( 3, rax); // load c 1182 __ store_ptr(3, rcx); // store a in c 1183 __ store_ptr(5, rax); // store c in a 1184 // stack: ..., c, d, a, b, c, d 1185 } 1186 1187 void TemplateTable::swap() { 1188 transition(vtos, vtos); 1189 // stack: ..., a, b 1190 __ load_ptr( 1, rcx); // load a 1191 __ load_ptr( 0, rax); // load b 1192 __ store_ptr(0, rcx); // store a in b 1193 __ store_ptr(1, rax); // store b in a 1194 // stack: ..., b, a 1195 } 1196 1197 void TemplateTable::iop2(Operation op) { 1198 transition(itos, itos); 1199 switch (op) { 1200 case add : __ pop_i(rdx); __ addl (rax, rdx); break; 1201 case sub : __ movl(rdx, rax); __ pop_i(rax); __ subl (rax, rdx); break; 1202 case mul : __ pop_i(rdx); __ imull(rax, rdx); break; 1203 case _and : __ pop_i(rdx); __ andl (rax, rdx); break; 1204 case _or : __ pop_i(rdx); __ orl (rax, rdx); break; 1205 case _xor : __ pop_i(rdx); __ xorl (rax, rdx); break; 1206 case shl : __ movl(rcx, rax); __ pop_i(rax); __ shll (rax); break; 1207 case shr : __ movl(rcx, rax); __ pop_i(rax); __ sarl (rax); break; 1208 case ushr : __ movl(rcx, rax); __ pop_i(rax); __ shrl (rax); break; 1209 default : ShouldNotReachHere(); 1210 } 1211 } 1212 1213 void TemplateTable::lop2(Operation op) { 1214 transition(ltos, ltos); 1215 switch (op) { 1216 case add : __ pop_l(rdx); __ addptr(rax, rdx); break; 1217 case sub : __ mov(rdx, rax); __ pop_l(rax); __ subptr(rax, rdx); break; 1218 case _and : __ pop_l(rdx); __ andptr(rax, rdx); break; 1219 case _or : __ pop_l(rdx); __ orptr (rax, rdx); break; 1220 case _xor : __ pop_l(rdx); __ xorptr(rax, rdx); break; 1221 default : ShouldNotReachHere(); 1222 } 1223 } 1224 1225 void TemplateTable::idiv() { 1226 transition(itos, itos); 1227 __ movl(rcx, rax); 1228 __ pop_i(rax); 1229 // Note: could xor eax and ecx and compare with (-1 ^ min_int). If 1230 // they are not equal, one could do a normal division (no correction 1231 // needed), which may speed up this implementation for the common case. 1232 // (see also JVM spec., p.243 & p.271) 1233 __ corrected_idivl(rcx); 1234 } 1235 1236 void TemplateTable::irem() { 1237 transition(itos, itos); 1238 __ movl(rcx, rax); 1239 __ pop_i(rax); 1240 // Note: could xor eax and ecx and compare with (-1 ^ min_int). If 1241 // they are not equal, one could do a normal division (no correction 1242 // needed), which may speed up this implementation for the common case. 1243 // (see also JVM spec., p.243 & p.271) 1244 __ corrected_idivl(rcx); 1245 __ movl(rax, rdx); 1246 } 1247 1248 void TemplateTable::lmul() { 1249 transition(ltos, ltos); 1250 __ pop_l(rdx); 1251 __ imulq(rax, rdx); 1252 } 1253 1254 void TemplateTable::ldiv() { 1255 transition(ltos, ltos); 1256 __ mov(rcx, rax); 1257 __ pop_l(rax); 1258 // generate explicit div0 check 1259 __ testq(rcx, rcx); 1260 __ jump_cc(Assembler::zero, 1261 ExternalAddress(Interpreter::_throw_ArithmeticException_entry)); 1262 // Note: could xor rax and rcx and compare with (-1 ^ min_int). If 1263 // they are not equal, one could do a normal division (no correction 1264 // needed), which may speed up this implementation for the common case. 1265 // (see also JVM spec., p.243 & p.271) 1266 __ corrected_idivq(rcx); // kills rbx 1267 } 1268 1269 void TemplateTable::lrem() { 1270 transition(ltos, ltos); 1271 __ mov(rcx, rax); 1272 __ pop_l(rax); 1273 __ testq(rcx, rcx); 1274 __ jump_cc(Assembler::zero, 1275 ExternalAddress(Interpreter::_throw_ArithmeticException_entry)); 1276 // Note: could xor rax and rcx and compare with (-1 ^ min_int). If 1277 // they are not equal, one could do a normal division (no correction 1278 // needed), which may speed up this implementation for the common case. 1279 // (see also JVM spec., p.243 & p.271) 1280 __ corrected_idivq(rcx); // kills rbx 1281 __ mov(rax, rdx); 1282 } 1283 1284 void TemplateTable::lshl() { 1285 transition(itos, ltos); 1286 __ movl(rcx, rax); // get shift count 1287 __ pop_l(rax); // get shift value 1288 __ shlq(rax); 1289 } 1290 1291 void TemplateTable::lshr() { 1292 transition(itos, ltos); 1293 __ movl(rcx, rax); // get shift count 1294 __ pop_l(rax); // get shift value 1295 __ sarq(rax); 1296 } 1297 1298 void TemplateTable::lushr() { 1299 transition(itos, ltos); 1300 __ movl(rcx, rax); // get shift count 1301 __ pop_l(rax); // get shift value 1302 __ shrq(rax); 1303 } 1304 1305 void TemplateTable::fop2(Operation op) { 1306 transition(ftos, ftos); 1307 switch (op) { 1308 case add: 1309 __ addss(xmm0, at_rsp()); 1310 __ addptr(rsp, Interpreter::stackElementSize); 1311 break; 1312 case sub: 1313 __ movflt(xmm1, xmm0); 1314 __ pop_f(xmm0); 1315 __ subss(xmm0, xmm1); 1316 break; 1317 case mul: 1318 __ mulss(xmm0, at_rsp()); 1319 __ addptr(rsp, Interpreter::stackElementSize); 1320 break; 1321 case div: 1322 __ movflt(xmm1, xmm0); 1323 __ pop_f(xmm0); 1324 __ divss(xmm0, xmm1); 1325 break; 1326 case rem: 1327 __ movflt(xmm1, xmm0); 1328 __ pop_f(xmm0); 1329 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::frem), 2); 1330 break; 1331 default: 1332 ShouldNotReachHere(); 1333 break; 1334 } 1335 } 1336 1337 void TemplateTable::dop2(Operation op) { 1338 transition(dtos, dtos); 1339 switch (op) { 1340 case add: 1341 __ addsd(xmm0, at_rsp()); 1342 __ addptr(rsp, 2 * Interpreter::stackElementSize); 1343 break; 1344 case sub: 1345 __ movdbl(xmm1, xmm0); 1346 __ pop_d(xmm0); 1347 __ subsd(xmm0, xmm1); 1348 break; 1349 case mul: 1350 __ mulsd(xmm0, at_rsp()); 1351 __ addptr(rsp, 2 * Interpreter::stackElementSize); 1352 break; 1353 case div: 1354 __ movdbl(xmm1, xmm0); 1355 __ pop_d(xmm0); 1356 __ divsd(xmm0, xmm1); 1357 break; 1358 case rem: 1359 __ movdbl(xmm1, xmm0); 1360 __ pop_d(xmm0); 1361 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::drem), 2); 1362 break; 1363 default: 1364 ShouldNotReachHere(); 1365 break; 1366 } 1367 } 1368 1369 void TemplateTable::ineg() { 1370 transition(itos, itos); 1371 __ negl(rax); 1372 } 1373 1374 void TemplateTable::lneg() { 1375 transition(ltos, ltos); 1376 __ negq(rax); 1377 } 1378 1379 // Note: 'double' and 'long long' have 32-bits alignment on x86. 1380 static jlong* double_quadword(jlong *adr, jlong lo, jlong hi) { 1381 // Use the expression (adr)&(~0xF) to provide 128-bits aligned address 1382 // of 128-bits operands for SSE instructions. 1383 jlong *operand = (jlong*)(((intptr_t)adr)&((intptr_t)(~0xF))); 1384 // Store the value to a 128-bits operand. 1385 operand[0] = lo; 1386 operand[1] = hi; 1387 return operand; 1388 } 1389 1390 // Buffer for 128-bits masks used by SSE instructions. 1391 static jlong float_signflip_pool[2*2]; 1392 static jlong double_signflip_pool[2*2]; 1393 1394 void TemplateTable::fneg() { 1395 transition(ftos, ftos); 1396 static jlong *float_signflip = double_quadword(&float_signflip_pool[1], 0x8000000080000000, 0x8000000080000000); 1397 __ xorps(xmm0, ExternalAddress((address) float_signflip)); 1398 } 1399 1400 void TemplateTable::dneg() { 1401 transition(dtos, dtos); 1402 static jlong *double_signflip = double_quadword(&double_signflip_pool[1], 0x8000000000000000, 0x8000000000000000); 1403 __ xorpd(xmm0, ExternalAddress((address) double_signflip)); 1404 } 1405 1406 void TemplateTable::iinc() { 1407 transition(vtos, vtos); 1408 __ load_signed_byte(rdx, at_bcp(2)); // get constant 1409 locals_index(rbx); 1410 __ addl(iaddress(rbx), rdx); 1411 } 1412 1413 void TemplateTable::wide_iinc() { 1414 transition(vtos, vtos); 1415 __ movl(rdx, at_bcp(4)); // get constant 1416 locals_index_wide(rbx); 1417 __ bswapl(rdx); // swap bytes & sign-extend constant 1418 __ sarl(rdx, 16); 1419 __ addl(iaddress(rbx), rdx); 1420 // Note: should probably use only one movl to get both 1421 // the index and the constant -> fix this 1422 } 1423 1424 void TemplateTable::convert() { 1425 // Checking 1426 #ifdef ASSERT 1427 { 1428 TosState tos_in = ilgl; 1429 TosState tos_out = ilgl; 1430 switch (bytecode()) { 1431 case Bytecodes::_i2l: // fall through 1432 case Bytecodes::_i2f: // fall through 1433 case Bytecodes::_i2d: // fall through 1434 case Bytecodes::_i2b: // fall through 1435 case Bytecodes::_i2c: // fall through 1436 case Bytecodes::_i2s: tos_in = itos; break; 1437 case Bytecodes::_l2i: // fall through 1438 case Bytecodes::_l2f: // fall through 1439 case Bytecodes::_l2d: tos_in = ltos; break; 1440 case Bytecodes::_f2i: // fall through 1441 case Bytecodes::_f2l: // fall through 1442 case Bytecodes::_f2d: tos_in = ftos; break; 1443 case Bytecodes::_d2i: // fall through 1444 case Bytecodes::_d2l: // fall through 1445 case Bytecodes::_d2f: tos_in = dtos; break; 1446 default : ShouldNotReachHere(); 1447 } 1448 switch (bytecode()) { 1449 case Bytecodes::_l2i: // fall through 1450 case Bytecodes::_f2i: // fall through 1451 case Bytecodes::_d2i: // fall through 1452 case Bytecodes::_i2b: // fall through 1453 case Bytecodes::_i2c: // fall through 1454 case Bytecodes::_i2s: tos_out = itos; break; 1455 case Bytecodes::_i2l: // fall through 1456 case Bytecodes::_f2l: // fall through 1457 case Bytecodes::_d2l: tos_out = ltos; break; 1458 case Bytecodes::_i2f: // fall through 1459 case Bytecodes::_l2f: // fall through 1460 case Bytecodes::_d2f: tos_out = ftos; break; 1461 case Bytecodes::_i2d: // fall through 1462 case Bytecodes::_l2d: // fall through 1463 case Bytecodes::_f2d: tos_out = dtos; break; 1464 default : ShouldNotReachHere(); 1465 } 1466 transition(tos_in, tos_out); 1467 } 1468 #endif // ASSERT 1469 1470 static const int64_t is_nan = 0x8000000000000000L; 1471 1472 // Conversion 1473 switch (bytecode()) { 1474 case Bytecodes::_i2l: 1475 __ movslq(rax, rax); 1476 break; 1477 case Bytecodes::_i2f: 1478 __ cvtsi2ssl(xmm0, rax); 1479 break; 1480 case Bytecodes::_i2d: 1481 __ cvtsi2sdl(xmm0, rax); 1482 break; 1483 case Bytecodes::_i2b: 1484 __ movsbl(rax, rax); 1485 break; 1486 case Bytecodes::_i2c: 1487 __ movzwl(rax, rax); 1488 break; 1489 case Bytecodes::_i2s: 1490 __ movswl(rax, rax); 1491 break; 1492 case Bytecodes::_l2i: 1493 __ movl(rax, rax); 1494 break; 1495 case Bytecodes::_l2f: 1496 __ cvtsi2ssq(xmm0, rax); 1497 break; 1498 case Bytecodes::_l2d: 1499 __ cvtsi2sdq(xmm0, rax); 1500 break; 1501 case Bytecodes::_f2i: 1502 { 1503 Label L; 1504 __ cvttss2sil(rax, xmm0); 1505 __ cmpl(rax, 0x80000000); // NaN or overflow/underflow? 1506 __ jcc(Assembler::notEqual, L); 1507 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::f2i), 1); 1508 __ bind(L); 1509 } 1510 break; 1511 case Bytecodes::_f2l: 1512 { 1513 Label L; 1514 __ cvttss2siq(rax, xmm0); 1515 // NaN or overflow/underflow? 1516 __ cmp64(rax, ExternalAddress((address) &is_nan)); 1517 __ jcc(Assembler::notEqual, L); 1518 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::f2l), 1); 1519 __ bind(L); 1520 } 1521 break; 1522 case Bytecodes::_f2d: 1523 __ cvtss2sd(xmm0, xmm0); 1524 break; 1525 case Bytecodes::_d2i: 1526 { 1527 Label L; 1528 __ cvttsd2sil(rax, xmm0); 1529 __ cmpl(rax, 0x80000000); // NaN or overflow/underflow? 1530 __ jcc(Assembler::notEqual, L); 1531 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::d2i), 1); 1532 __ bind(L); 1533 } 1534 break; 1535 case Bytecodes::_d2l: 1536 { 1537 Label L; 1538 __ cvttsd2siq(rax, xmm0); 1539 // NaN or overflow/underflow? 1540 __ cmp64(rax, ExternalAddress((address) &is_nan)); 1541 __ jcc(Assembler::notEqual, L); 1542 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::d2l), 1); 1543 __ bind(L); 1544 } 1545 break; 1546 case Bytecodes::_d2f: 1547 __ cvtsd2ss(xmm0, xmm0); 1548 break; 1549 default: 1550 ShouldNotReachHere(); 1551 } 1552 } 1553 1554 void TemplateTable::lcmp() { 1555 transition(ltos, itos); 1556 Label done; 1557 __ pop_l(rdx); 1558 __ cmpq(rdx, rax); 1559 __ movl(rax, -1); 1560 __ jccb(Assembler::less, done); 1561 __ setb(Assembler::notEqual, rax); 1562 __ movzbl(rax, rax); 1563 __ bind(done); 1564 } 1565 1566 void TemplateTable::float_cmp(bool is_float, int unordered_result) { 1567 Label done; 1568 if (is_float) { 1569 // XXX get rid of pop here, use ... reg, mem32 1570 __ pop_f(xmm1); 1571 __ ucomiss(xmm1, xmm0); 1572 } else { 1573 // XXX get rid of pop here, use ... reg, mem64 1574 __ pop_d(xmm1); 1575 __ ucomisd(xmm1, xmm0); 1576 } 1577 if (unordered_result < 0) { 1578 __ movl(rax, -1); 1579 __ jccb(Assembler::parity, done); 1580 __ jccb(Assembler::below, done); 1581 __ setb(Assembler::notEqual, rdx); 1582 __ movzbl(rax, rdx); 1583 } else { 1584 __ movl(rax, 1); 1585 __ jccb(Assembler::parity, done); 1586 __ jccb(Assembler::above, done); 1587 __ movl(rax, 0); 1588 __ jccb(Assembler::equal, done); 1589 __ decrementl(rax); 1590 } 1591 __ bind(done); 1592 } 1593 1594 void TemplateTable::branch(bool is_jsr, bool is_wide) { 1595 __ get_method(rcx); // rcx holds method 1596 __ profile_taken_branch(rax, rbx); // rax holds updated MDP, rbx 1597 // holds bumped taken count 1598 1599 const ByteSize be_offset = methodOopDesc::backedge_counter_offset() + 1600 InvocationCounter::counter_offset(); 1601 const ByteSize inv_offset = methodOopDesc::invocation_counter_offset() + 1602 InvocationCounter::counter_offset(); 1603 const int method_offset = frame::interpreter_frame_method_offset * wordSize; 1604 1605 // Load up edx with the branch displacement 1606 __ movl(rdx, at_bcp(1)); 1607 __ bswapl(rdx); 1608 1609 if (!is_wide) { 1610 __ sarl(rdx, 16); 1611 } 1612 __ movl2ptr(rdx, rdx); 1613 1614 // Handle all the JSR stuff here, then exit. 1615 // It's much shorter and cleaner than intermingling with the non-JSR 1616 // normal-branch stuff occurring below. 1617 if (is_jsr) { 1618 // Pre-load the next target bytecode into rbx 1619 __ load_unsigned_byte(rbx, Address(r13, rdx, Address::times_1, 0)); 1620 1621 // compute return address as bci in rax 1622 __ lea(rax, at_bcp((is_wide ? 5 : 3) - 1623 in_bytes(constMethodOopDesc::codes_offset()))); 1624 __ subptr(rax, Address(rcx, methodOopDesc::const_offset())); 1625 // Adjust the bcp in r13 by the displacement in rdx 1626 __ addptr(r13, rdx); 1627 // jsr returns atos that is not an oop 1628 __ push_i(rax); 1629 __ dispatch_only(vtos); 1630 return; 1631 } 1632 1633 // Normal (non-jsr) branch handling 1634 1635 // Adjust the bcp in r13 by the displacement in rdx 1636 __ addptr(r13, rdx); 1637 1638 assert(UseLoopCounter || !UseOnStackReplacement, 1639 "on-stack-replacement requires loop counters"); 1640 Label backedge_counter_overflow; 1641 Label profile_method; 1642 Label dispatch; 1643 if (UseLoopCounter) { 1644 // increment backedge counter for backward branches 1645 // rax: MDO 1646 // ebx: MDO bumped taken-count 1647 // rcx: method 1648 // rdx: target offset 1649 // r13: target bcp 1650 // r14: locals pointer 1651 __ testl(rdx, rdx); // check if forward or backward branch 1652 __ jcc(Assembler::positive, dispatch); // count only if backward branch 1653 if (TieredCompilation) { 1654 Label no_mdo; 1655 int increment = InvocationCounter::count_increment; 1656 int mask = ((1 << Tier0BackedgeNotifyFreqLog) - 1) << InvocationCounter::count_shift; 1657 if (ProfileInterpreter) { 1658 // Are we profiling? 1659 __ movptr(rbx, Address(rcx, in_bytes(methodOopDesc::method_data_offset()))); 1660 __ testptr(rbx, rbx); 1661 __ jccb(Assembler::zero, no_mdo); 1662 // Increment the MDO backedge counter 1663 const Address mdo_backedge_counter(rbx, in_bytes(methodDataOopDesc::backedge_counter_offset()) + 1664 in_bytes(InvocationCounter::counter_offset())); 1665 __ increment_mask_and_jump(mdo_backedge_counter, increment, mask, 1666 rax, false, Assembler::zero, &backedge_counter_overflow); 1667 __ jmp(dispatch); 1668 } 1669 __ bind(no_mdo); 1670 // Increment backedge counter in methodOop 1671 __ increment_mask_and_jump(Address(rcx, be_offset), increment, mask, 1672 rax, false, Assembler::zero, &backedge_counter_overflow); 1673 } else { 1674 // increment counter 1675 __ movl(rax, Address(rcx, be_offset)); // load backedge counter 1676 __ incrementl(rax, InvocationCounter::count_increment); // increment counter 1677 __ movl(Address(rcx, be_offset), rax); // store counter 1678 1679 __ movl(rax, Address(rcx, inv_offset)); // load invocation counter 1680 __ andl(rax, InvocationCounter::count_mask_value); // and the status bits 1681 __ addl(rax, Address(rcx, be_offset)); // add both counters 1682 1683 if (ProfileInterpreter) { 1684 // Test to see if we should create a method data oop 1685 __ cmp32(rax, 1686 ExternalAddress((address) &InvocationCounter::InterpreterProfileLimit)); 1687 __ jcc(Assembler::less, dispatch); 1688 1689 // if no method data exists, go to profile method 1690 __ test_method_data_pointer(rax, profile_method); 1691 1692 if (UseOnStackReplacement) { 1693 // check for overflow against ebx which is the MDO taken count 1694 __ cmp32(rbx, 1695 ExternalAddress((address) &InvocationCounter::InterpreterBackwardBranchLimit)); 1696 __ jcc(Assembler::below, dispatch); 1697 1698 // When ProfileInterpreter is on, the backedge_count comes 1699 // from the methodDataOop, which value does not get reset on 1700 // the call to frequency_counter_overflow(). To avoid 1701 // excessive calls to the overflow routine while the method is 1702 // being compiled, add a second test to make sure the overflow 1703 // function is called only once every overflow_frequency. 1704 const int overflow_frequency = 1024; 1705 __ andl(rbx, overflow_frequency - 1); 1706 __ jcc(Assembler::zero, backedge_counter_overflow); 1707 1708 } 1709 } else { 1710 if (UseOnStackReplacement) { 1711 // check for overflow against eax, which is the sum of the 1712 // counters 1713 __ cmp32(rax, 1714 ExternalAddress((address) &InvocationCounter::InterpreterBackwardBranchLimit)); 1715 __ jcc(Assembler::aboveEqual, backedge_counter_overflow); 1716 1717 } 1718 } 1719 } 1720 __ bind(dispatch); 1721 } 1722 1723 // Pre-load the next target bytecode into rbx 1724 __ load_unsigned_byte(rbx, Address(r13, 0)); 1725 1726 // continue with the bytecode @ target 1727 // eax: return bci for jsr's, unused otherwise 1728 // ebx: target bytecode 1729 // r13: target bcp 1730 __ dispatch_only(vtos); 1731 1732 if (UseLoopCounter) { 1733 if (ProfileInterpreter) { 1734 // Out-of-line code to allocate method data oop. 1735 __ bind(profile_method); 1736 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method)); 1737 __ load_unsigned_byte(rbx, Address(r13, 0)); // restore target bytecode 1738 __ set_method_data_pointer_for_bcp(); 1739 __ jmp(dispatch); 1740 } 1741 1742 if (UseOnStackReplacement) { 1743 // invocation counter overflow 1744 __ bind(backedge_counter_overflow); 1745 __ negptr(rdx); 1746 __ addptr(rdx, r13); // branch bcp 1747 // IcoResult frequency_counter_overflow([JavaThread*], address branch_bcp) 1748 __ call_VM(noreg, 1749 CAST_FROM_FN_PTR(address, 1750 InterpreterRuntime::frequency_counter_overflow), 1751 rdx); 1752 __ load_unsigned_byte(rbx, Address(r13, 0)); // restore target bytecode 1753 1754 // rax: osr nmethod (osr ok) or NULL (osr not possible) 1755 // ebx: target bytecode 1756 // rdx: scratch 1757 // r14: locals pointer 1758 // r13: bcp 1759 __ testptr(rax, rax); // test result 1760 __ jcc(Assembler::zero, dispatch); // no osr if null 1761 // nmethod may have been invalidated (VM may block upon call_VM return) 1762 __ movl(rcx, Address(rax, nmethod::entry_bci_offset())); 1763 __ cmpl(rcx, InvalidOSREntryBci); 1764 __ jcc(Assembler::equal, dispatch); 1765 1766 // We have the address of an on stack replacement routine in eax 1767 // We need to prepare to execute the OSR method. First we must 1768 // migrate the locals and monitors off of the stack. 1769 1770 __ mov(r13, rax); // save the nmethod 1771 1772 call_VM(noreg, CAST_FROM_FN_PTR(address, SharedRuntime::OSR_migration_begin)); 1773 1774 // eax is OSR buffer, move it to expected parameter location 1775 __ mov(j_rarg0, rax); 1776 1777 // We use j_rarg definitions here so that registers don't conflict as parameter 1778 // registers change across platforms as we are in the midst of a calling 1779 // sequence to the OSR nmethod and we don't want collision. These are NOT parameters. 1780 1781 const Register retaddr = j_rarg2; 1782 const Register sender_sp = j_rarg1; 1783 1784 // pop the interpreter frame 1785 __ movptr(sender_sp, Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize)); // get sender sp 1786 __ leave(); // remove frame anchor 1787 __ pop(retaddr); // get return address 1788 __ mov(rsp, sender_sp); // set sp to sender sp 1789 // Ensure compiled code always sees stack at proper alignment 1790 __ andptr(rsp, -(StackAlignmentInBytes)); 1791 1792 // unlike x86 we need no specialized return from compiled code 1793 // to the interpreter or the call stub. 1794 1795 // push the return address 1796 __ push(retaddr); 1797 1798 // and begin the OSR nmethod 1799 __ jmp(Address(r13, nmethod::osr_entry_point_offset())); 1800 } 1801 } 1802 } 1803 1804 1805 void TemplateTable::if_0cmp(Condition cc) { 1806 transition(itos, vtos); 1807 // assume branch is more often taken than not (loops use backward branches) 1808 Label not_taken; 1809 __ testl(rax, rax); 1810 __ jcc(j_not(cc), not_taken); 1811 branch(false, false); 1812 __ bind(not_taken); 1813 __ profile_not_taken_branch(rax); 1814 } 1815 1816 void TemplateTable::if_icmp(Condition cc) { 1817 transition(itos, vtos); 1818 // assume branch is more often taken than not (loops use backward branches) 1819 Label not_taken; 1820 __ pop_i(rdx); 1821 __ cmpl(rdx, rax); 1822 __ jcc(j_not(cc), not_taken); 1823 branch(false, false); 1824 __ bind(not_taken); 1825 __ profile_not_taken_branch(rax); 1826 } 1827 1828 void TemplateTable::if_nullcmp(Condition cc) { 1829 transition(atos, vtos); 1830 // assume branch is more often taken than not (loops use backward branches) 1831 Label not_taken; 1832 __ testptr(rax, rax); 1833 __ jcc(j_not(cc), not_taken); 1834 branch(false, false); 1835 __ bind(not_taken); 1836 __ profile_not_taken_branch(rax); 1837 } 1838 1839 void TemplateTable::if_acmp(Condition cc) { 1840 transition(atos, vtos); 1841 // assume branch is more often taken than not (loops use backward branches) 1842 Label not_taken; 1843 __ pop_ptr(rdx); 1844 __ cmpptr(rdx, rax); 1845 __ jcc(j_not(cc), not_taken); 1846 branch(false, false); 1847 __ bind(not_taken); 1848 __ profile_not_taken_branch(rax); 1849 } 1850 1851 void TemplateTable::ret() { 1852 transition(vtos, vtos); 1853 locals_index(rbx); 1854 __ movslq(rbx, iaddress(rbx)); // get return bci, compute return bcp 1855 __ profile_ret(rbx, rcx); 1856 __ get_method(rax); 1857 __ movptr(r13, Address(rax, methodOopDesc::const_offset())); 1858 __ lea(r13, Address(r13, rbx, Address::times_1, 1859 constMethodOopDesc::codes_offset())); 1860 __ dispatch_next(vtos); 1861 } 1862 1863 void TemplateTable::wide_ret() { 1864 transition(vtos, vtos); 1865 locals_index_wide(rbx); 1866 __ movptr(rbx, aaddress(rbx)); // get return bci, compute return bcp 1867 __ profile_ret(rbx, rcx); 1868 __ get_method(rax); 1869 __ movptr(r13, Address(rax, methodOopDesc::const_offset())); 1870 __ lea(r13, Address(r13, rbx, Address::times_1, constMethodOopDesc::codes_offset())); 1871 __ dispatch_next(vtos); 1872 } 1873 1874 void TemplateTable::tableswitch() { 1875 Label default_case, continue_execution; 1876 transition(itos, vtos); 1877 // align r13 1878 __ lea(rbx, at_bcp(BytesPerInt)); 1879 __ andptr(rbx, -BytesPerInt); 1880 // load lo & hi 1881 __ movl(rcx, Address(rbx, BytesPerInt)); 1882 __ movl(rdx, Address(rbx, 2 * BytesPerInt)); 1883 __ bswapl(rcx); 1884 __ bswapl(rdx); 1885 // check against lo & hi 1886 __ cmpl(rax, rcx); 1887 __ jcc(Assembler::less, default_case); 1888 __ cmpl(rax, rdx); 1889 __ jcc(Assembler::greater, default_case); 1890 // lookup dispatch offset 1891 __ subl(rax, rcx); 1892 __ movl(rdx, Address(rbx, rax, Address::times_4, 3 * BytesPerInt)); 1893 __ profile_switch_case(rax, rbx, rcx); 1894 // continue execution 1895 __ bind(continue_execution); 1896 __ bswapl(rdx); 1897 __ movl2ptr(rdx, rdx); 1898 __ load_unsigned_byte(rbx, Address(r13, rdx, Address::times_1)); 1899 __ addptr(r13, rdx); 1900 __ dispatch_only(vtos); 1901 // handle default 1902 __ bind(default_case); 1903 __ profile_switch_default(rax); 1904 __ movl(rdx, Address(rbx, 0)); 1905 __ jmp(continue_execution); 1906 } 1907 1908 void TemplateTable::lookupswitch() { 1909 transition(itos, itos); 1910 __ stop("lookupswitch bytecode should have been rewritten"); 1911 } 1912 1913 void TemplateTable::fast_linearswitch() { 1914 transition(itos, vtos); 1915 Label loop_entry, loop, found, continue_execution; 1916 // bswap rax so we can avoid bswapping the table entries 1917 __ bswapl(rax); 1918 // align r13 1919 __ lea(rbx, at_bcp(BytesPerInt)); // btw: should be able to get rid of 1920 // this instruction (change offsets 1921 // below) 1922 __ andptr(rbx, -BytesPerInt); 1923 // set counter 1924 __ movl(rcx, Address(rbx, BytesPerInt)); 1925 __ bswapl(rcx); 1926 __ jmpb(loop_entry); 1927 // table search 1928 __ bind(loop); 1929 __ cmpl(rax, Address(rbx, rcx, Address::times_8, 2 * BytesPerInt)); 1930 __ jcc(Assembler::equal, found); 1931 __ bind(loop_entry); 1932 __ decrementl(rcx); 1933 __ jcc(Assembler::greaterEqual, loop); 1934 // default case 1935 __ profile_switch_default(rax); 1936 __ movl(rdx, Address(rbx, 0)); 1937 __ jmp(continue_execution); 1938 // entry found -> get offset 1939 __ bind(found); 1940 __ movl(rdx, Address(rbx, rcx, Address::times_8, 3 * BytesPerInt)); 1941 __ profile_switch_case(rcx, rax, rbx); 1942 // continue execution 1943 __ bind(continue_execution); 1944 __ bswapl(rdx); 1945 __ movl2ptr(rdx, rdx); 1946 __ load_unsigned_byte(rbx, Address(r13, rdx, Address::times_1)); 1947 __ addptr(r13, rdx); 1948 __ dispatch_only(vtos); 1949 } 1950 1951 void TemplateTable::fast_binaryswitch() { 1952 transition(itos, vtos); 1953 // Implementation using the following core algorithm: 1954 // 1955 // int binary_search(int key, LookupswitchPair* array, int n) { 1956 // // Binary search according to "Methodik des Programmierens" by 1957 // // Edsger W. Dijkstra and W.H.J. Feijen, Addison Wesley Germany 1985. 1958 // int i = 0; 1959 // int j = n; 1960 // while (i+1 < j) { 1961 // // invariant P: 0 <= i < j <= n and (a[i] <= key < a[j] or Q) 1962 // // with Q: for all i: 0 <= i < n: key < a[i] 1963 // // where a stands for the array and assuming that the (inexisting) 1964 // // element a[n] is infinitely big. 1965 // int h = (i + j) >> 1; 1966 // // i < h < j 1967 // if (key < array[h].fast_match()) { 1968 // j = h; 1969 // } else { 1970 // i = h; 1971 // } 1972 // } 1973 // // R: a[i] <= key < a[i+1] or Q 1974 // // (i.e., if key is within array, i is the correct index) 1975 // return i; 1976 // } 1977 1978 // Register allocation 1979 const Register key = rax; // already set (tosca) 1980 const Register array = rbx; 1981 const Register i = rcx; 1982 const Register j = rdx; 1983 const Register h = rdi; 1984 const Register temp = rsi; 1985 1986 // Find array start 1987 __ lea(array, at_bcp(3 * BytesPerInt)); // btw: should be able to 1988 // get rid of this 1989 // instruction (change 1990 // offsets below) 1991 __ andptr(array, -BytesPerInt); 1992 1993 // Initialize i & j 1994 __ xorl(i, i); // i = 0; 1995 __ movl(j, Address(array, -BytesPerInt)); // j = length(array); 1996 1997 // Convert j into native byteordering 1998 __ bswapl(j); 1999 2000 // And start 2001 Label entry; 2002 __ jmp(entry); 2003 2004 // binary search loop 2005 { 2006 Label loop; 2007 __ bind(loop); 2008 // int h = (i + j) >> 1; 2009 __ leal(h, Address(i, j, Address::times_1)); // h = i + j; 2010 __ sarl(h, 1); // h = (i + j) >> 1; 2011 // if (key < array[h].fast_match()) { 2012 // j = h; 2013 // } else { 2014 // i = h; 2015 // } 2016 // Convert array[h].match to native byte-ordering before compare 2017 __ movl(temp, Address(array, h, Address::times_8)); 2018 __ bswapl(temp); 2019 __ cmpl(key, temp); 2020 // j = h if (key < array[h].fast_match()) 2021 __ cmovl(Assembler::less, j, h); 2022 // i = h if (key >= array[h].fast_match()) 2023 __ cmovl(Assembler::greaterEqual, i, h); 2024 // while (i+1 < j) 2025 __ bind(entry); 2026 __ leal(h, Address(i, 1)); // i+1 2027 __ cmpl(h, j); // i+1 < j 2028 __ jcc(Assembler::less, loop); 2029 } 2030 2031 // end of binary search, result index is i (must check again!) 2032 Label default_case; 2033 // Convert array[i].match to native byte-ordering before compare 2034 __ movl(temp, Address(array, i, Address::times_8)); 2035 __ bswapl(temp); 2036 __ cmpl(key, temp); 2037 __ jcc(Assembler::notEqual, default_case); 2038 2039 // entry found -> j = offset 2040 __ movl(j , Address(array, i, Address::times_8, BytesPerInt)); 2041 __ profile_switch_case(i, key, array); 2042 __ bswapl(j); 2043 __ movl2ptr(j, j); 2044 __ load_unsigned_byte(rbx, Address(r13, j, Address::times_1)); 2045 __ addptr(r13, j); 2046 __ dispatch_only(vtos); 2047 2048 // default case -> j = default offset 2049 __ bind(default_case); 2050 __ profile_switch_default(i); 2051 __ movl(j, Address(array, -2 * BytesPerInt)); 2052 __ bswapl(j); 2053 __ movl2ptr(j, j); 2054 __ load_unsigned_byte(rbx, Address(r13, j, Address::times_1)); 2055 __ addptr(r13, j); 2056 __ dispatch_only(vtos); 2057 } 2058 2059 2060 void TemplateTable::_return(TosState state) { 2061 transition(state, state); 2062 assert(_desc->calls_vm(), 2063 "inconsistent calls_vm information"); // call in remove_activation 2064 2065 if (_desc->bytecode() == Bytecodes::_return_register_finalizer) { 2066 assert(state == vtos, "only valid state"); 2067 __ movptr(c_rarg1, aaddress(0)); 2068 __ load_klass(rdi, c_rarg1); 2069 __ movl(rdi, Address(rdi, Klass::access_flags_offset())); 2070 __ testl(rdi, JVM_ACC_HAS_FINALIZER); 2071 Label skip_register_finalizer; 2072 __ jcc(Assembler::zero, skip_register_finalizer); 2073 2074 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::register_finalizer), c_rarg1); 2075 2076 __ bind(skip_register_finalizer); 2077 } 2078 2079 __ remove_activation(state, r13); 2080 __ jmp(r13); 2081 } 2082 2083 // ---------------------------------------------------------------------------- 2084 // Volatile variables demand their effects be made known to all CPU's 2085 // in order. Store buffers on most chips allow reads & writes to 2086 // reorder; the JMM's ReadAfterWrite.java test fails in -Xint mode 2087 // without some kind of memory barrier (i.e., it's not sufficient that 2088 // the interpreter does not reorder volatile references, the hardware 2089 // also must not reorder them). 2090 // 2091 // According to the new Java Memory Model (JMM): 2092 // (1) All volatiles are serialized wrt to each other. ALSO reads & 2093 // writes act as aquire & release, so: 2094 // (2) A read cannot let unrelated NON-volatile memory refs that 2095 // happen after the read float up to before the read. It's OK for 2096 // non-volatile memory refs that happen before the volatile read to 2097 // float down below it. 2098 // (3) Similar a volatile write cannot let unrelated NON-volatile 2099 // memory refs that happen BEFORE the write float down to after the 2100 // write. It's OK for non-volatile memory refs that happen after the 2101 // volatile write to float up before it. 2102 // 2103 // We only put in barriers around volatile refs (they are expensive), 2104 // not _between_ memory refs (that would require us to track the 2105 // flavor of the previous memory refs). Requirements (2) and (3) 2106 // require some barriers before volatile stores and after volatile 2107 // loads. These nearly cover requirement (1) but miss the 2108 // volatile-store-volatile-load case. This final case is placed after 2109 // volatile-stores although it could just as well go before 2110 // volatile-loads. 2111 void TemplateTable::volatile_barrier(Assembler::Membar_mask_bits 2112 order_constraint) { 2113 // Helper function to insert a is-volatile test and memory barrier 2114 if (os::is_MP()) { // Not needed on single CPU 2115 __ membar(order_constraint); 2116 } 2117 } 2118 2119 void TemplateTable::resolve_cache_and_index(int byte_no, 2120 Register result, 2121 Register Rcache, 2122 Register index, 2123 size_t index_size) { 2124 const Register temp = rbx; 2125 assert_different_registers(result, Rcache, index, temp); 2126 2127 Label resolved; 2128 if (byte_no == f1_oop) { 2129 // We are resolved if the f1 field contains a non-null object (CallSite, etc.) 2130 // This kind of CP cache entry does not need to match the flags byte, because 2131 // there is a 1-1 relation between bytecode type and CP entry type. 2132 assert(result != noreg, ""); //else do cmpptr(Address(...), (int32_t) NULL_WORD) 2133 __ get_cache_and_index_at_bcp(Rcache, index, 1, index_size); 2134 __ movptr(result, Address(Rcache, index, Address::times_ptr, constantPoolCacheOopDesc::base_offset() + ConstantPoolCacheEntry::f1_offset())); 2135 __ testptr(result, result); 2136 __ jcc(Assembler::notEqual, resolved); 2137 } else { 2138 assert(byte_no == f1_byte || byte_no == f2_byte, "byte_no out of range"); 2139 assert(result == noreg, ""); //else change code for setting result 2140 __ get_cache_and_index_and_bytecode_at_bcp(Rcache, index, temp, byte_no, 1, index_size); 2141 __ cmpl(temp, (int) bytecode()); // have we resolved this bytecode? 2142 __ jcc(Assembler::equal, resolved); 2143 } 2144 2145 // resolve first time through 2146 address entry; 2147 switch (bytecode()) { 2148 case Bytecodes::_getstatic: 2149 case Bytecodes::_putstatic: 2150 case Bytecodes::_getfield: 2151 case Bytecodes::_putfield: 2152 entry = CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_get_put); 2153 break; 2154 case Bytecodes::_invokevirtual: 2155 case Bytecodes::_invokespecial: 2156 case Bytecodes::_invokestatic: 2157 case Bytecodes::_invokeinterface: 2158 entry = CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_invoke); 2159 break; 2160 case Bytecodes::_invokedynamic: 2161 entry = CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_invokedynamic); 2162 break; 2163 case Bytecodes::_fast_aldc: 2164 entry = CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_ldc); 2165 break; 2166 case Bytecodes::_fast_aldc_w: 2167 entry = CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_ldc); 2168 break; 2169 default: 2170 ShouldNotReachHere(); 2171 break; 2172 } 2173 __ movl(temp, (int) bytecode()); 2174 __ call_VM(noreg, entry, temp); 2175 2176 // Update registers with resolved info 2177 __ get_cache_and_index_at_bcp(Rcache, index, 1, index_size); 2178 if (result != noreg) 2179 __ movptr(result, Address(Rcache, index, Address::times_ptr, constantPoolCacheOopDesc::base_offset() + ConstantPoolCacheEntry::f1_offset())); 2180 __ bind(resolved); 2181 } 2182 2183 // The Rcache and index registers must be set before call 2184 void TemplateTable::load_field_cp_cache_entry(Register obj, 2185 Register cache, 2186 Register index, 2187 Register off, 2188 Register flags, 2189 bool is_static = false) { 2190 assert_different_registers(cache, index, flags, off); 2191 2192 ByteSize cp_base_offset = constantPoolCacheOopDesc::base_offset(); 2193 // Field offset 2194 __ movptr(off, Address(cache, index, Address::times_8, 2195 in_bytes(cp_base_offset + 2196 ConstantPoolCacheEntry::f2_offset()))); 2197 // Flags 2198 __ movl(flags, Address(cache, index, Address::times_8, 2199 in_bytes(cp_base_offset + 2200 ConstantPoolCacheEntry::flags_offset()))); 2201 2202 // klass overwrite register 2203 if (is_static) { 2204 __ movptr(obj, Address(cache, index, Address::times_8, 2205 in_bytes(cp_base_offset + 2206 ConstantPoolCacheEntry::f1_offset()))); 2207 } 2208 } 2209 2210 void TemplateTable::load_invoke_cp_cache_entry(int byte_no, 2211 Register method, 2212 Register itable_index, 2213 Register flags, 2214 bool is_invokevirtual, 2215 bool is_invokevfinal, /*unused*/ 2216 bool is_invokedynamic) { 2217 // setup registers 2218 const Register cache = rcx; 2219 const Register index = rdx; 2220 assert_different_registers(method, flags); 2221 assert_different_registers(method, cache, index); 2222 assert_different_registers(itable_index, flags); 2223 assert_different_registers(itable_index, cache, index); 2224 // determine constant pool cache field offsets 2225 const int method_offset = in_bytes( 2226 constantPoolCacheOopDesc::base_offset() + 2227 (is_invokevirtual 2228 ? ConstantPoolCacheEntry::f2_offset() 2229 : ConstantPoolCacheEntry::f1_offset())); 2230 const int flags_offset = in_bytes(constantPoolCacheOopDesc::base_offset() + 2231 ConstantPoolCacheEntry::flags_offset()); 2232 // access constant pool cache fields 2233 const int index_offset = in_bytes(constantPoolCacheOopDesc::base_offset() + 2234 ConstantPoolCacheEntry::f2_offset()); 2235 2236 if (byte_no == f1_oop) { 2237 // Resolved f1_oop goes directly into 'method' register. 2238 assert(is_invokedynamic, ""); 2239 resolve_cache_and_index(byte_no, method, cache, index, sizeof(u4)); 2240 } else { 2241 resolve_cache_and_index(byte_no, noreg, cache, index, sizeof(u2)); 2242 __ movptr(method, Address(cache, index, Address::times_ptr, method_offset)); 2243 } 2244 if (itable_index != noreg) { 2245 __ movptr(itable_index, Address(cache, index, Address::times_ptr, index_offset)); 2246 } 2247 __ movl(flags, Address(cache, index, Address::times_ptr, flags_offset)); 2248 } 2249 2250 2251 // The registers cache and index expected to be set before call. 2252 // Correct values of the cache and index registers are preserved. 2253 void TemplateTable::jvmti_post_field_access(Register cache, Register index, 2254 bool is_static, bool has_tos) { 2255 // do the JVMTI work here to avoid disturbing the register state below 2256 // We use c_rarg registers here because we want to use the register used in 2257 // the call to the VM 2258 if (JvmtiExport::can_post_field_access()) { 2259 // Check to see if a field access watch has been set before we 2260 // take the time to call into the VM. 2261 Label L1; 2262 assert_different_registers(cache, index, rax); 2263 __ mov32(rax, ExternalAddress((address) JvmtiExport::get_field_access_count_addr())); 2264 __ testl(rax, rax); 2265 __ jcc(Assembler::zero, L1); 2266 2267 __ get_cache_and_index_at_bcp(c_rarg2, c_rarg3, 1); 2268 2269 // cache entry pointer 2270 __ addptr(c_rarg2, in_bytes(constantPoolCacheOopDesc::base_offset())); 2271 __ shll(c_rarg3, LogBytesPerWord); 2272 __ addptr(c_rarg2, c_rarg3); 2273 if (is_static) { 2274 __ xorl(c_rarg1, c_rarg1); // NULL object reference 2275 } else { 2276 __ movptr(c_rarg1, at_tos()); // get object pointer without popping it 2277 __ verify_oop(c_rarg1); 2278 } 2279 // c_rarg1: object pointer or NULL 2280 // c_rarg2: cache entry pointer 2281 // c_rarg3: jvalue object on the stack 2282 __ call_VM(noreg, CAST_FROM_FN_PTR(address, 2283 InterpreterRuntime::post_field_access), 2284 c_rarg1, c_rarg2, c_rarg3); 2285 __ get_cache_and_index_at_bcp(cache, index, 1); 2286 __ bind(L1); 2287 } 2288 } 2289 2290 void TemplateTable::pop_and_check_object(Register r) { 2291 __ pop_ptr(r); 2292 __ null_check(r); // for field access must check obj. 2293 __ verify_oop(r); 2294 } 2295 2296 void TemplateTable::getfield_or_static(int byte_no, bool is_static) { 2297 transition(vtos, vtos); 2298 2299 const Register cache = rcx; 2300 const Register index = rdx; 2301 const Register obj = c_rarg3; 2302 const Register off = rbx; 2303 const Register flags = rax; 2304 const Register bc = c_rarg3; // uses same reg as obj, so don't mix them 2305 2306 resolve_cache_and_index(byte_no, noreg, cache, index, sizeof(u2)); 2307 jvmti_post_field_access(cache, index, is_static, false); 2308 load_field_cp_cache_entry(obj, cache, index, off, flags, is_static); 2309 2310 if (!is_static) { 2311 // obj is on the stack 2312 pop_and_check_object(obj); 2313 } 2314 2315 const Address field(obj, off, Address::times_1); 2316 2317 Label Done, notByte, notInt, notShort, notChar, 2318 notLong, notFloat, notObj, notDouble; 2319 2320 __ shrl(flags, ConstantPoolCacheEntry::tosBits); 2321 assert(btos == 0, "change code, btos != 0"); 2322 2323 __ andl(flags, 0x0F); 2324 __ jcc(Assembler::notZero, notByte); 2325 // btos 2326 __ load_signed_byte(rax, field); 2327 __ push(btos); 2328 // Rewrite bytecode to be faster 2329 if (!is_static) { 2330 patch_bytecode(Bytecodes::_fast_bgetfield, bc, rbx); 2331 } 2332 __ jmp(Done); 2333 2334 __ bind(notByte); 2335 __ cmpl(flags, atos); 2336 __ jcc(Assembler::notEqual, notObj); 2337 // atos 2338 __ load_heap_oop(rax, field); 2339 __ push(atos); 2340 if (!is_static) { 2341 patch_bytecode(Bytecodes::_fast_agetfield, bc, rbx); 2342 } 2343 __ jmp(Done); 2344 2345 __ bind(notObj); 2346 __ cmpl(flags, itos); 2347 __ jcc(Assembler::notEqual, notInt); 2348 // itos 2349 __ movl(rax, field); 2350 __ push(itos); 2351 // Rewrite bytecode to be faster 2352 if (!is_static) { 2353 patch_bytecode(Bytecodes::_fast_igetfield, bc, rbx); 2354 } 2355 __ jmp(Done); 2356 2357 __ bind(notInt); 2358 __ cmpl(flags, ctos); 2359 __ jcc(Assembler::notEqual, notChar); 2360 // ctos 2361 __ load_unsigned_short(rax, field); 2362 __ push(ctos); 2363 // Rewrite bytecode to be faster 2364 if (!is_static) { 2365 patch_bytecode(Bytecodes::_fast_cgetfield, bc, rbx); 2366 } 2367 __ jmp(Done); 2368 2369 __ bind(notChar); 2370 __ cmpl(flags, stos); 2371 __ jcc(Assembler::notEqual, notShort); 2372 // stos 2373 __ load_signed_short(rax, field); 2374 __ push(stos); 2375 // Rewrite bytecode to be faster 2376 if (!is_static) { 2377 patch_bytecode(Bytecodes::_fast_sgetfield, bc, rbx); 2378 } 2379 __ jmp(Done); 2380 2381 __ bind(notShort); 2382 __ cmpl(flags, ltos); 2383 __ jcc(Assembler::notEqual, notLong); 2384 // ltos 2385 __ movq(rax, field); 2386 __ push(ltos); 2387 // Rewrite bytecode to be faster 2388 if (!is_static) { 2389 patch_bytecode(Bytecodes::_fast_lgetfield, bc, rbx); 2390 } 2391 __ jmp(Done); 2392 2393 __ bind(notLong); 2394 __ cmpl(flags, ftos); 2395 __ jcc(Assembler::notEqual, notFloat); 2396 // ftos 2397 __ movflt(xmm0, field); 2398 __ push(ftos); 2399 // Rewrite bytecode to be faster 2400 if (!is_static) { 2401 patch_bytecode(Bytecodes::_fast_fgetfield, bc, rbx); 2402 } 2403 __ jmp(Done); 2404 2405 __ bind(notFloat); 2406 #ifdef ASSERT 2407 __ cmpl(flags, dtos); 2408 __ jcc(Assembler::notEqual, notDouble); 2409 #endif 2410 // dtos 2411 __ movdbl(xmm0, field); 2412 __ push(dtos); 2413 // Rewrite bytecode to be faster 2414 if (!is_static) { 2415 patch_bytecode(Bytecodes::_fast_dgetfield, bc, rbx); 2416 } 2417 #ifdef ASSERT 2418 __ jmp(Done); 2419 2420 __ bind(notDouble); 2421 __ stop("Bad state"); 2422 #endif 2423 2424 __ bind(Done); 2425 // [jk] not needed currently 2426 // volatile_barrier(Assembler::Membar_mask_bits(Assembler::LoadLoad | 2427 // Assembler::LoadStore)); 2428 } 2429 2430 2431 void TemplateTable::getfield(int byte_no) { 2432 getfield_or_static(byte_no, false); 2433 } 2434 2435 void TemplateTable::getstatic(int byte_no) { 2436 getfield_or_static(byte_no, true); 2437 } 2438 2439 // The registers cache and index expected to be set before call. 2440 // The function may destroy various registers, just not the cache and index registers. 2441 void TemplateTable::jvmti_post_field_mod(Register cache, Register index, bool is_static) { 2442 transition(vtos, vtos); 2443 2444 ByteSize cp_base_offset = constantPoolCacheOopDesc::base_offset(); 2445 2446 if (JvmtiExport::can_post_field_modification()) { 2447 // Check to see if a field modification watch has been set before 2448 // we take the time to call into the VM. 2449 Label L1; 2450 assert_different_registers(cache, index, rax); 2451 __ mov32(rax, ExternalAddress((address)JvmtiExport::get_field_modification_count_addr())); 2452 __ testl(rax, rax); 2453 __ jcc(Assembler::zero, L1); 2454 2455 __ get_cache_and_index_at_bcp(c_rarg2, rscratch1, 1); 2456 2457 if (is_static) { 2458 // Life is simple. Null out the object pointer. 2459 __ xorl(c_rarg1, c_rarg1); 2460 } else { 2461 // Life is harder. The stack holds the value on top, followed by 2462 // the object. We don't know the size of the value, though; it 2463 // could be one or two words depending on its type. As a result, 2464 // we must find the type to determine where the object is. 2465 __ movl(c_rarg3, Address(c_rarg2, rscratch1, 2466 Address::times_8, 2467 in_bytes(cp_base_offset + 2468 ConstantPoolCacheEntry::flags_offset()))); 2469 __ shrl(c_rarg3, ConstantPoolCacheEntry::tosBits); 2470 // Make sure we don't need to mask rcx for tosBits after the 2471 // above shift 2472 ConstantPoolCacheEntry::verify_tosBits(); 2473 __ movptr(c_rarg1, at_tos_p1()); // initially assume a one word jvalue 2474 __ cmpl(c_rarg3, ltos); 2475 __ cmovptr(Assembler::equal, 2476 c_rarg1, at_tos_p2()); // ltos (two word jvalue) 2477 __ cmpl(c_rarg3, dtos); 2478 __ cmovptr(Assembler::equal, 2479 c_rarg1, at_tos_p2()); // dtos (two word jvalue) 2480 } 2481 // cache entry pointer 2482 __ addptr(c_rarg2, in_bytes(cp_base_offset)); 2483 __ shll(rscratch1, LogBytesPerWord); 2484 __ addptr(c_rarg2, rscratch1); 2485 // object (tos) 2486 __ mov(c_rarg3, rsp); 2487 // c_rarg1: object pointer set up above (NULL if static) 2488 // c_rarg2: cache entry pointer 2489 // c_rarg3: jvalue object on the stack 2490 __ call_VM(noreg, 2491 CAST_FROM_FN_PTR(address, 2492 InterpreterRuntime::post_field_modification), 2493 c_rarg1, c_rarg2, c_rarg3); 2494 __ get_cache_and_index_at_bcp(cache, index, 1); 2495 __ bind(L1); 2496 } 2497 } 2498 2499 void TemplateTable::putfield_or_static(int byte_no, bool is_static) { 2500 transition(vtos, vtos); 2501 2502 const Register cache = rcx; 2503 const Register index = rdx; 2504 const Register obj = rcx; 2505 const Register off = rbx; 2506 const Register flags = rax; 2507 const Register bc = c_rarg3; 2508 2509 resolve_cache_and_index(byte_no, noreg, cache, index, sizeof(u2)); 2510 jvmti_post_field_mod(cache, index, is_static); 2511 load_field_cp_cache_entry(obj, cache, index, off, flags, is_static); 2512 2513 // [jk] not needed currently 2514 // volatile_barrier(Assembler::Membar_mask_bits(Assembler::LoadStore | 2515 // Assembler::StoreStore)); 2516 2517 Label notVolatile, Done; 2518 __ movl(rdx, flags); 2519 __ shrl(rdx, ConstantPoolCacheEntry::volatileField); 2520 __ andl(rdx, 0x1); 2521 2522 // field address 2523 const Address field(obj, off, Address::times_1); 2524 2525 Label notByte, notInt, notShort, notChar, 2526 notLong, notFloat, notObj, notDouble; 2527 2528 __ shrl(flags, ConstantPoolCacheEntry::tosBits); 2529 2530 assert(btos == 0, "change code, btos != 0"); 2531 __ andl(flags, 0x0f); 2532 __ jcc(Assembler::notZero, notByte); 2533 2534 // btos 2535 { 2536 __ pop(btos); 2537 if (!is_static) pop_and_check_object(obj); 2538 __ movb(field, rax); 2539 if (!is_static) { 2540 patch_bytecode(Bytecodes::_fast_bputfield, bc, rbx, true, byte_no); 2541 } 2542 __ jmp(Done); 2543 } 2544 2545 __ bind(notByte); 2546 __ cmpl(flags, atos); 2547 __ jcc(Assembler::notEqual, notObj); 2548 2549 // atos 2550 { 2551 __ pop(atos); 2552 if (!is_static) pop_and_check_object(obj); 2553 // Store into the field 2554 do_oop_store(_masm, field, rax, _bs->kind(), false); 2555 if (!is_static) { 2556 patch_bytecode(Bytecodes::_fast_aputfield, bc, rbx, true, byte_no); 2557 } 2558 __ jmp(Done); 2559 } 2560 2561 __ bind(notObj); 2562 __ cmpl(flags, itos); 2563 __ jcc(Assembler::notEqual, notInt); 2564 2565 // itos 2566 { 2567 __ pop(itos); 2568 if (!is_static) pop_and_check_object(obj); 2569 __ movl(field, rax); 2570 if (!is_static) { 2571 patch_bytecode(Bytecodes::_fast_iputfield, bc, rbx, true, byte_no); 2572 } 2573 __ jmp(Done); 2574 } 2575 2576 __ bind(notInt); 2577 __ cmpl(flags, ctos); 2578 __ jcc(Assembler::notEqual, notChar); 2579 2580 // ctos 2581 { 2582 __ pop(ctos); 2583 if (!is_static) pop_and_check_object(obj); 2584 __ movw(field, rax); 2585 if (!is_static) { 2586 patch_bytecode(Bytecodes::_fast_cputfield, bc, rbx, true, byte_no); 2587 } 2588 __ jmp(Done); 2589 } 2590 2591 __ bind(notChar); 2592 __ cmpl(flags, stos); 2593 __ jcc(Assembler::notEqual, notShort); 2594 2595 // stos 2596 { 2597 __ pop(stos); 2598 if (!is_static) pop_and_check_object(obj); 2599 __ movw(field, rax); 2600 if (!is_static) { 2601 patch_bytecode(Bytecodes::_fast_sputfield, bc, rbx, true, byte_no); 2602 } 2603 __ jmp(Done); 2604 } 2605 2606 __ bind(notShort); 2607 __ cmpl(flags, ltos); 2608 __ jcc(Assembler::notEqual, notLong); 2609 2610 // ltos 2611 { 2612 __ pop(ltos); 2613 if (!is_static) pop_and_check_object(obj); 2614 __ movq(field, rax); 2615 if (!is_static) { 2616 patch_bytecode(Bytecodes::_fast_lputfield, bc, rbx, true, byte_no); 2617 } 2618 __ jmp(Done); 2619 } 2620 2621 __ bind(notLong); 2622 __ cmpl(flags, ftos); 2623 __ jcc(Assembler::notEqual, notFloat); 2624 2625 // ftos 2626 { 2627 __ pop(ftos); 2628 if (!is_static) pop_and_check_object(obj); 2629 __ movflt(field, xmm0); 2630 if (!is_static) { 2631 patch_bytecode(Bytecodes::_fast_fputfield, bc, rbx, true, byte_no); 2632 } 2633 __ jmp(Done); 2634 } 2635 2636 __ bind(notFloat); 2637 #ifdef ASSERT 2638 __ cmpl(flags, dtos); 2639 __ jcc(Assembler::notEqual, notDouble); 2640 #endif 2641 2642 // dtos 2643 { 2644 __ pop(dtos); 2645 if (!is_static) pop_and_check_object(obj); 2646 __ movdbl(field, xmm0); 2647 if (!is_static) { 2648 patch_bytecode(Bytecodes::_fast_dputfield, bc, rbx, true, byte_no); 2649 } 2650 } 2651 2652 #ifdef ASSERT 2653 __ jmp(Done); 2654 2655 __ bind(notDouble); 2656 __ stop("Bad state"); 2657 #endif 2658 2659 __ bind(Done); 2660 2661 // Check for volatile store 2662 __ testl(rdx, rdx); 2663 __ jcc(Assembler::zero, notVolatile); 2664 volatile_barrier(Assembler::Membar_mask_bits(Assembler::StoreLoad | 2665 Assembler::StoreStore)); 2666 __ bind(notVolatile); 2667 } 2668 2669 void TemplateTable::putfield(int byte_no) { 2670 putfield_or_static(byte_no, false); 2671 } 2672 2673 void TemplateTable::putstatic(int byte_no) { 2674 putfield_or_static(byte_no, true); 2675 } 2676 2677 void TemplateTable::jvmti_post_fast_field_mod() { 2678 if (JvmtiExport::can_post_field_modification()) { 2679 // Check to see if a field modification watch has been set before 2680 // we take the time to call into the VM. 2681 Label L2; 2682 __ mov32(c_rarg3, ExternalAddress((address)JvmtiExport::get_field_modification_count_addr())); 2683 __ testl(c_rarg3, c_rarg3); 2684 __ jcc(Assembler::zero, L2); 2685 __ pop_ptr(rbx); // copy the object pointer from tos 2686 __ verify_oop(rbx); 2687 __ push_ptr(rbx); // put the object pointer back on tos 2688 __ subptr(rsp, sizeof(jvalue)); // add space for a jvalue object 2689 __ mov(c_rarg3, rsp); 2690 const Address field(c_rarg3, 0); 2691 2692 switch (bytecode()) { // load values into the jvalue object 2693 case Bytecodes::_fast_aputfield: __ movq(field, rax); break; 2694 case Bytecodes::_fast_lputfield: __ movq(field, rax); break; 2695 case Bytecodes::_fast_iputfield: __ movl(field, rax); break; 2696 case Bytecodes::_fast_bputfield: __ movb(field, rax); break; 2697 case Bytecodes::_fast_sputfield: // fall through 2698 case Bytecodes::_fast_cputfield: __ movw(field, rax); break; 2699 case Bytecodes::_fast_fputfield: __ movflt(field, xmm0); break; 2700 case Bytecodes::_fast_dputfield: __ movdbl(field, xmm0); break; 2701 default: 2702 ShouldNotReachHere(); 2703 } 2704 2705 // Save rax because call_VM() will clobber it, then use it for 2706 // JVMTI purposes 2707 __ push(rax); 2708 // access constant pool cache entry 2709 __ get_cache_entry_pointer_at_bcp(c_rarg2, rax, 1); 2710 __ verify_oop(rbx); 2711 // rbx: object pointer copied above 2712 // c_rarg2: cache entry pointer 2713 // c_rarg3: jvalue object on the stack 2714 __ call_VM(noreg, 2715 CAST_FROM_FN_PTR(address, 2716 InterpreterRuntime::post_field_modification), 2717 rbx, c_rarg2, c_rarg3); 2718 __ pop(rax); // restore lower value 2719 __ addptr(rsp, sizeof(jvalue)); // release jvalue object space 2720 __ bind(L2); 2721 } 2722 } 2723 2724 void TemplateTable::fast_storefield(TosState state) { 2725 transition(state, vtos); 2726 2727 ByteSize base = constantPoolCacheOopDesc::base_offset(); 2728 2729 jvmti_post_fast_field_mod(); 2730 2731 // access constant pool cache 2732 __ get_cache_and_index_at_bcp(rcx, rbx, 1); 2733 2734 // test for volatile with rdx 2735 __ movl(rdx, Address(rcx, rbx, Address::times_8, 2736 in_bytes(base + 2737 ConstantPoolCacheEntry::flags_offset()))); 2738 2739 // replace index with field offset from cache entry 2740 __ movptr(rbx, Address(rcx, rbx, Address::times_8, 2741 in_bytes(base + ConstantPoolCacheEntry::f2_offset()))); 2742 2743 // [jk] not needed currently 2744 // volatile_barrier(Assembler::Membar_mask_bits(Assembler::LoadStore | 2745 // Assembler::StoreStore)); 2746 2747 Label notVolatile; 2748 __ shrl(rdx, ConstantPoolCacheEntry::volatileField); 2749 __ andl(rdx, 0x1); 2750 2751 // Get object from stack 2752 pop_and_check_object(rcx); 2753 2754 // field address 2755 const Address field(rcx, rbx, Address::times_1); 2756 2757 // access field 2758 switch (bytecode()) { 2759 case Bytecodes::_fast_aputfield: 2760 do_oop_store(_masm, field, rax, _bs->kind(), false); 2761 break; 2762 case Bytecodes::_fast_lputfield: 2763 __ movq(field, rax); 2764 break; 2765 case Bytecodes::_fast_iputfield: 2766 __ movl(field, rax); 2767 break; 2768 case Bytecodes::_fast_bputfield: 2769 __ movb(field, rax); 2770 break; 2771 case Bytecodes::_fast_sputfield: 2772 // fall through 2773 case Bytecodes::_fast_cputfield: 2774 __ movw(field, rax); 2775 break; 2776 case Bytecodes::_fast_fputfield: 2777 __ movflt(field, xmm0); 2778 break; 2779 case Bytecodes::_fast_dputfield: 2780 __ movdbl(field, xmm0); 2781 break; 2782 default: 2783 ShouldNotReachHere(); 2784 } 2785 2786 // Check for volatile store 2787 __ testl(rdx, rdx); 2788 __ jcc(Assembler::zero, notVolatile); 2789 volatile_barrier(Assembler::Membar_mask_bits(Assembler::StoreLoad | 2790 Assembler::StoreStore)); 2791 __ bind(notVolatile); 2792 } 2793 2794 2795 void TemplateTable::fast_accessfield(TosState state) { 2796 transition(atos, state); 2797 2798 // Do the JVMTI work here to avoid disturbing the register state below 2799 if (JvmtiExport::can_post_field_access()) { 2800 // Check to see if a field access watch has been set before we 2801 // take the time to call into the VM. 2802 Label L1; 2803 __ mov32(rcx, ExternalAddress((address) JvmtiExport::get_field_access_count_addr())); 2804 __ testl(rcx, rcx); 2805 __ jcc(Assembler::zero, L1); 2806 // access constant pool cache entry 2807 __ get_cache_entry_pointer_at_bcp(c_rarg2, rcx, 1); 2808 __ verify_oop(rax); 2809 __ push_ptr(rax); // save object pointer before call_VM() clobbers it 2810 __ mov(c_rarg1, rax); 2811 // c_rarg1: object pointer copied above 2812 // c_rarg2: cache entry pointer 2813 __ call_VM(noreg, 2814 CAST_FROM_FN_PTR(address, 2815 InterpreterRuntime::post_field_access), 2816 c_rarg1, c_rarg2); 2817 __ pop_ptr(rax); // restore object pointer 2818 __ bind(L1); 2819 } 2820 2821 // access constant pool cache 2822 __ get_cache_and_index_at_bcp(rcx, rbx, 1); 2823 // replace index with field offset from cache entry 2824 // [jk] not needed currently 2825 // if (os::is_MP()) { 2826 // __ movl(rdx, Address(rcx, rbx, Address::times_8, 2827 // in_bytes(constantPoolCacheOopDesc::base_offset() + 2828 // ConstantPoolCacheEntry::flags_offset()))); 2829 // __ shrl(rdx, ConstantPoolCacheEntry::volatileField); 2830 // __ andl(rdx, 0x1); 2831 // } 2832 __ movptr(rbx, Address(rcx, rbx, Address::times_8, 2833 in_bytes(constantPoolCacheOopDesc::base_offset() + 2834 ConstantPoolCacheEntry::f2_offset()))); 2835 2836 // rax: object 2837 __ verify_oop(rax); 2838 __ null_check(rax); 2839 Address field(rax, rbx, Address::times_1); 2840 2841 // access field 2842 switch (bytecode()) { 2843 case Bytecodes::_fast_agetfield: 2844 __ load_heap_oop(rax, field); 2845 __ verify_oop(rax); 2846 break; 2847 case Bytecodes::_fast_lgetfield: 2848 __ movq(rax, field); 2849 break; 2850 case Bytecodes::_fast_igetfield: 2851 __ movl(rax, field); 2852 break; 2853 case Bytecodes::_fast_bgetfield: 2854 __ movsbl(rax, field); 2855 break; 2856 case Bytecodes::_fast_sgetfield: 2857 __ load_signed_short(rax, field); 2858 break; 2859 case Bytecodes::_fast_cgetfield: 2860 __ load_unsigned_short(rax, field); 2861 break; 2862 case Bytecodes::_fast_fgetfield: 2863 __ movflt(xmm0, field); 2864 break; 2865 case Bytecodes::_fast_dgetfield: 2866 __ movdbl(xmm0, field); 2867 break; 2868 default: 2869 ShouldNotReachHere(); 2870 } 2871 // [jk] not needed currently 2872 // if (os::is_MP()) { 2873 // Label notVolatile; 2874 // __ testl(rdx, rdx); 2875 // __ jcc(Assembler::zero, notVolatile); 2876 // __ membar(Assembler::LoadLoad); 2877 // __ bind(notVolatile); 2878 //}; 2879 } 2880 2881 void TemplateTable::fast_xaccess(TosState state) { 2882 transition(vtos, state); 2883 2884 // get receiver 2885 __ movptr(rax, aaddress(0)); 2886 // access constant pool cache 2887 __ get_cache_and_index_at_bcp(rcx, rdx, 2); 2888 __ movptr(rbx, 2889 Address(rcx, rdx, Address::times_8, 2890 in_bytes(constantPoolCacheOopDesc::base_offset() + 2891 ConstantPoolCacheEntry::f2_offset()))); 2892 // make sure exception is reported in correct bcp range (getfield is 2893 // next instruction) 2894 __ increment(r13); 2895 __ null_check(rax); 2896 switch (state) { 2897 case itos: 2898 __ movl(rax, Address(rax, rbx, Address::times_1)); 2899 break; 2900 case atos: 2901 __ load_heap_oop(rax, Address(rax, rbx, Address::times_1)); 2902 __ verify_oop(rax); 2903 break; 2904 case ftos: 2905 __ movflt(xmm0, Address(rax, rbx, Address::times_1)); 2906 break; 2907 default: 2908 ShouldNotReachHere(); 2909 } 2910 2911 // [jk] not needed currently 2912 // if (os::is_MP()) { 2913 // Label notVolatile; 2914 // __ movl(rdx, Address(rcx, rdx, Address::times_8, 2915 // in_bytes(constantPoolCacheOopDesc::base_offset() + 2916 // ConstantPoolCacheEntry::flags_offset()))); 2917 // __ shrl(rdx, ConstantPoolCacheEntry::volatileField); 2918 // __ testl(rdx, 0x1); 2919 // __ jcc(Assembler::zero, notVolatile); 2920 // __ membar(Assembler::LoadLoad); 2921 // __ bind(notVolatile); 2922 // } 2923 2924 __ decrement(r13); 2925 } 2926 2927 2928 2929 //----------------------------------------------------------------------------- 2930 // Calls 2931 2932 void TemplateTable::count_calls(Register method, Register temp) { 2933 // implemented elsewhere 2934 ShouldNotReachHere(); 2935 } 2936 2937 void TemplateTable::prepare_invoke(Register method, Register index, int byte_no) { 2938 // determine flags 2939 Bytecodes::Code code = bytecode(); 2940 const bool is_invokeinterface = code == Bytecodes::_invokeinterface; 2941 const bool is_invokedynamic = code == Bytecodes::_invokedynamic; 2942 const bool is_invokevirtual = code == Bytecodes::_invokevirtual; 2943 const bool is_invokespecial = code == Bytecodes::_invokespecial; 2944 const bool load_receiver = (code != Bytecodes::_invokestatic && code != Bytecodes::_invokedynamic); 2945 const bool receiver_null_check = is_invokespecial; 2946 const bool save_flags = is_invokeinterface || is_invokevirtual; 2947 // setup registers & access constant pool cache 2948 const Register recv = rcx; 2949 const Register flags = rdx; 2950 assert_different_registers(method, index, recv, flags); 2951 2952 // save 'interpreter return address' 2953 __ save_bcp(); 2954 2955 load_invoke_cp_cache_entry(byte_no, method, index, flags, is_invokevirtual, false, is_invokedynamic); 2956 2957 // load receiver if needed (note: no return address pushed yet) 2958 if (load_receiver) { 2959 assert(!is_invokedynamic, ""); 2960 __ movl(recv, flags); 2961 __ andl(recv, 0xFF); 2962 Address recv_addr(rsp, recv, Address::times_8, -Interpreter::expr_offset_in_bytes(1)); 2963 __ movptr(recv, recv_addr); 2964 __ verify_oop(recv); 2965 } 2966 2967 // do null check if needed 2968 if (receiver_null_check) { 2969 __ null_check(recv); 2970 } 2971 2972 if (save_flags) { 2973 __ movl(r13, flags); 2974 } 2975 2976 // compute return type 2977 __ shrl(flags, ConstantPoolCacheEntry::tosBits); 2978 // Make sure we don't need to mask flags for tosBits after the above shift 2979 ConstantPoolCacheEntry::verify_tosBits(); 2980 // load return address 2981 { 2982 address table_addr; 2983 if (is_invokeinterface || is_invokedynamic) 2984 table_addr = (address)Interpreter::return_5_addrs_by_index_table(); 2985 else 2986 table_addr = (address)Interpreter::return_3_addrs_by_index_table(); 2987 ExternalAddress table(table_addr); 2988 __ lea(rscratch1, table); 2989 __ movptr(flags, Address(rscratch1, flags, Address::times_ptr)); 2990 } 2991 2992 // push return address 2993 __ push(flags); 2994 2995 // Restore flag field from the constant pool cache, and restore esi 2996 // for later null checks. r13 is the bytecode pointer 2997 if (save_flags) { 2998 __ movl(flags, r13); 2999 __ restore_bcp(); 3000 } 3001 } 3002 3003 3004 void TemplateTable::invokevirtual_helper(Register index, 3005 Register recv, 3006 Register flags) { 3007 // Uses temporary registers rax, rdx 3008 assert_different_registers(index, recv, rax, rdx); 3009 3010 // Test for an invoke of a final method 3011 Label notFinal; 3012 __ movl(rax, flags); 3013 __ andl(rax, (1 << ConstantPoolCacheEntry::vfinalMethod)); 3014 __ jcc(Assembler::zero, notFinal); 3015 3016 const Register method = index; // method must be rbx 3017 assert(method == rbx, 3018 "methodOop must be rbx for interpreter calling convention"); 3019 3020 // do the call - the index is actually the method to call 3021 __ verify_oop(method); 3022 3023 // It's final, need a null check here! 3024 __ null_check(recv); 3025 3026 // profile this call 3027 __ profile_final_call(rax); 3028 3029 __ jump_from_interpreted(method, rax); 3030 3031 __ bind(notFinal); 3032 3033 // get receiver klass 3034 __ null_check(recv, oopDesc::klass_offset_in_bytes()); 3035 __ load_klass(rax, recv); 3036 3037 __ verify_oop(rax); 3038 3039 // profile this call 3040 __ profile_virtual_call(rax, r14, rdx); 3041 3042 // get target methodOop & entry point 3043 const int base = instanceKlass::vtable_start_offset() * wordSize; 3044 assert(vtableEntry::size() * wordSize == 8, 3045 "adjust the scaling in the code below"); 3046 __ movptr(method, Address(rax, index, 3047 Address::times_8, 3048 base + vtableEntry::method_offset_in_bytes())); 3049 __ movptr(rdx, Address(method, methodOopDesc::interpreter_entry_offset())); 3050 __ jump_from_interpreted(method, rdx); 3051 } 3052 3053 3054 void TemplateTable::invokevirtual(int byte_no) { 3055 transition(vtos, vtos); 3056 assert(byte_no == f2_byte, "use this argument"); 3057 prepare_invoke(rbx, noreg, byte_no); 3058 3059 // rbx: index 3060 // rcx: receiver 3061 // rdx: flags 3062 3063 invokevirtual_helper(rbx, rcx, rdx); 3064 } 3065 3066 3067 void TemplateTable::invokespecial(int byte_no) { 3068 transition(vtos, vtos); 3069 assert(byte_no == f1_byte, "use this argument"); 3070 prepare_invoke(rbx, noreg, byte_no); 3071 // do the call 3072 __ verify_oop(rbx); 3073 __ profile_call(rax); 3074 __ jump_from_interpreted(rbx, rax); 3075 } 3076 3077 3078 void TemplateTable::invokestatic(int byte_no) { 3079 transition(vtos, vtos); 3080 assert(byte_no == f1_byte, "use this argument"); 3081 prepare_invoke(rbx, noreg, byte_no); 3082 // do the call 3083 __ verify_oop(rbx); 3084 __ profile_call(rax); 3085 __ jump_from_interpreted(rbx, rax); 3086 } 3087 3088 void TemplateTable::fast_invokevfinal(int byte_no) { 3089 transition(vtos, vtos); 3090 assert(byte_no == f2_byte, "use this argument"); 3091 __ stop("fast_invokevfinal not used on amd64"); 3092 } 3093 3094 void TemplateTable::invokeinterface(int byte_no) { 3095 transition(vtos, vtos); 3096 assert(byte_no == f1_byte, "use this argument"); 3097 prepare_invoke(rax, rbx, byte_no); 3098 3099 // rax: Interface 3100 // rbx: index 3101 // rcx: receiver 3102 // rdx: flags 3103 3104 // Special case of invokeinterface called for virtual method of 3105 // java.lang.Object. See cpCacheOop.cpp for details. 3106 // This code isn't produced by javac, but could be produced by 3107 // another compliant java compiler. 3108 Label notMethod; 3109 __ movl(r14, rdx); 3110 __ andl(r14, (1 << ConstantPoolCacheEntry::methodInterface)); 3111 __ jcc(Assembler::zero, notMethod); 3112 3113 invokevirtual_helper(rbx, rcx, rdx); 3114 __ bind(notMethod); 3115 3116 // Get receiver klass into rdx - also a null check 3117 __ restore_locals(); // restore r14 3118 __ load_klass(rdx, rcx); 3119 __ verify_oop(rdx); 3120 3121 // profile this call 3122 __ profile_virtual_call(rdx, r13, r14); 3123 3124 Label no_such_interface, no_such_method; 3125 3126 __ lookup_interface_method(// inputs: rec. class, interface, itable index 3127 rdx, rax, rbx, 3128 // outputs: method, scan temp. reg 3129 rbx, r13, 3130 no_such_interface); 3131 3132 // rbx,: methodOop to call 3133 // rcx: receiver 3134 // Check for abstract method error 3135 // Note: This should be done more efficiently via a throw_abstract_method_error 3136 // interpreter entry point and a conditional jump to it in case of a null 3137 // method. 3138 __ testptr(rbx, rbx); 3139 __ jcc(Assembler::zero, no_such_method); 3140 3141 // do the call 3142 // rcx: receiver 3143 // rbx,: methodOop 3144 __ jump_from_interpreted(rbx, rdx); 3145 __ should_not_reach_here(); 3146 3147 // exception handling code follows... 3148 // note: must restore interpreter registers to canonical 3149 // state for exception handling to work correctly! 3150 3151 __ bind(no_such_method); 3152 // throw exception 3153 __ pop(rbx); // pop return address (pushed by prepare_invoke) 3154 __ restore_bcp(); // r13 must be correct for exception handler (was destroyed) 3155 __ restore_locals(); // make sure locals pointer is correct as well (was destroyed) 3156 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_AbstractMethodError)); 3157 // the call_VM checks for exception, so we should never return here. 3158 __ should_not_reach_here(); 3159 3160 __ bind(no_such_interface); 3161 // throw exception 3162 __ pop(rbx); // pop return address (pushed by prepare_invoke) 3163 __ restore_bcp(); // r13 must be correct for exception handler (was destroyed) 3164 __ restore_locals(); // make sure locals pointer is correct as well (was destroyed) 3165 __ call_VM(noreg, CAST_FROM_FN_PTR(address, 3166 InterpreterRuntime::throw_IncompatibleClassChangeError)); 3167 // the call_VM checks for exception, so we should never return here. 3168 __ should_not_reach_here(); 3169 return; 3170 } 3171 3172 void TemplateTable::invokedynamic(int byte_no) { 3173 transition(vtos, vtos); 3174 assert(byte_no == f1_oop, "use this argument"); 3175 3176 if (!EnableInvokeDynamic) { 3177 // We should not encounter this bytecode if !EnableInvokeDynamic. 3178 // The verifier will stop it. However, if we get past the verifier, 3179 // this will stop the thread in a reasonable way, without crashing the JVM. 3180 __ call_VM(noreg, CAST_FROM_FN_PTR(address, 3181 InterpreterRuntime::throw_IncompatibleClassChangeError)); 3182 // the call_VM checks for exception, so we should never return here. 3183 __ should_not_reach_here(); 3184 return; 3185 } 3186 3187 prepare_invoke(rax, rbx, byte_no); 3188 3189 // rax: CallSite object (f1) 3190 // rbx: unused (f2) 3191 // rcx: receiver address 3192 // rdx: flags (unused) 3193 3194 Register rax_callsite = rax; 3195 Register rcx_method_handle = rcx; 3196 3197 // %%% should make a type profile for any invokedynamic that takes a ref argument 3198 // profile this call 3199 __ profile_call(r13); 3200 3201 __ verify_oop(rax_callsite); 3202 __ load_heap_oop(rcx_method_handle, Address(rax_callsite, __ delayed_value(java_lang_invoke_CallSite::target_offset_in_bytes, rdx))); 3203 __ null_check(rcx_method_handle); 3204 __ verify_oop(rcx_method_handle); 3205 __ prepare_to_jump_from_interpreted(); 3206 __ jump_to_method_handle_entry(rcx_method_handle, rdx); 3207 } 3208 3209 3210 //----------------------------------------------------------------------------- 3211 // Allocation 3212 3213 void TemplateTable::_new() { 3214 transition(vtos, atos); 3215 __ get_unsigned_2_byte_index_at_bcp(rdx, 1); 3216 Label slow_case; 3217 Label done; 3218 Label initialize_header; 3219 Label initialize_object; // including clearing the fields 3220 Label allocate_shared; 3221 3222 __ get_cpool_and_tags(rsi, rax); 3223 // Make sure the class we're about to instantiate has been resolved. 3224 // This is done before loading instanceKlass to be consistent with the order 3225 // how Constant Pool is updated (see constantPoolOopDesc::klass_at_put) 3226 const int tags_offset = typeArrayOopDesc::header_size(T_BYTE) * wordSize; 3227 __ cmpb(Address(rax, rdx, Address::times_1, tags_offset), 3228 JVM_CONSTANT_Class); 3229 __ jcc(Assembler::notEqual, slow_case); 3230 3231 // get instanceKlass 3232 __ movptr(rsi, Address(rsi, rdx, 3233 Address::times_8, sizeof(constantPoolOopDesc))); 3234 3235 // make sure klass is initialized & doesn't have finalizer 3236 // make sure klass is fully initialized 3237 __ cmpl(Address(rsi, 3238 instanceKlass::init_state_offset()), 3239 instanceKlass::fully_initialized); 3240 __ jcc(Assembler::notEqual, slow_case); 3241 3242 // get instance_size in instanceKlass (scaled to a count of bytes) 3243 __ movl(rdx, 3244 Address(rsi, 3245 Klass::layout_helper_offset())); 3246 // test to see if it has a finalizer or is malformed in some way 3247 __ testl(rdx, Klass::_lh_instance_slow_path_bit); 3248 __ jcc(Assembler::notZero, slow_case); 3249 3250 // Allocate the instance 3251 // 1) Try to allocate in the TLAB 3252 // 2) if fail and the object is large allocate in the shared Eden 3253 // 3) if the above fails (or is not applicable), go to a slow case 3254 // (creates a new TLAB, etc.) 3255 3256 const bool allow_shared_alloc = 3257 Universe::heap()->supports_inline_contig_alloc() && !CMSIncrementalMode; 3258 3259 if (UseTLAB) { 3260 __ movptr(rax, Address(r15_thread, in_bytes(JavaThread::tlab_top_offset()))); 3261 __ lea(rbx, Address(rax, rdx, Address::times_1)); 3262 __ cmpptr(rbx, Address(r15_thread, in_bytes(JavaThread::tlab_end_offset()))); 3263 __ jcc(Assembler::above, allow_shared_alloc ? allocate_shared : slow_case); 3264 __ movptr(Address(r15_thread, in_bytes(JavaThread::tlab_top_offset())), rbx); 3265 if (ZeroTLAB) { 3266 // the fields have been already cleared 3267 __ jmp(initialize_header); 3268 } else { 3269 // initialize both the header and fields 3270 __ jmp(initialize_object); 3271 } 3272 } 3273 3274 // Allocation in the shared Eden, if allowed. 3275 // 3276 // rdx: instance size in bytes 3277 if (allow_shared_alloc) { 3278 __ bind(allocate_shared); 3279 3280 ExternalAddress top((address)Universe::heap()->top_addr()); 3281 ExternalAddress end((address)Universe::heap()->end_addr()); 3282 3283 const Register RtopAddr = rscratch1; 3284 const Register RendAddr = rscratch2; 3285 3286 __ lea(RtopAddr, top); 3287 __ lea(RendAddr, end); 3288 __ movptr(rax, Address(RtopAddr, 0)); 3289 3290 // For retries rax gets set by cmpxchgq 3291 Label retry; 3292 __ bind(retry); 3293 __ lea(rbx, Address(rax, rdx, Address::times_1)); 3294 __ cmpptr(rbx, Address(RendAddr, 0)); 3295 __ jcc(Assembler::above, slow_case); 3296 3297 // Compare rax with the top addr, and if still equal, store the new 3298 // top addr in rbx at the address of the top addr pointer. Sets ZF if was 3299 // equal, and clears it otherwise. Use lock prefix for atomicity on MPs. 3300 // 3301 // rax: object begin 3302 // rbx: object end 3303 // rdx: instance size in bytes 3304 if (os::is_MP()) { 3305 __ lock(); 3306 } 3307 __ cmpxchgptr(rbx, Address(RtopAddr, 0)); 3308 3309 // if someone beat us on the allocation, try again, otherwise continue 3310 __ jcc(Assembler::notEqual, retry); 3311 3312 __ incr_allocated_bytes(r15_thread, rdx, 0); 3313 } 3314 3315 if (UseTLAB || Universe::heap()->supports_inline_contig_alloc()) { 3316 // The object is initialized before the header. If the object size is 3317 // zero, go directly to the header initialization. 3318 __ bind(initialize_object); 3319 __ decrementl(rdx, sizeof(oopDesc)); 3320 __ jcc(Assembler::zero, initialize_header); 3321 3322 // Initialize object fields 3323 __ xorl(rcx, rcx); // use zero reg to clear memory (shorter code) 3324 __ shrl(rdx, LogBytesPerLong); // divide by oopSize to simplify the loop 3325 { 3326 Label loop; 3327 __ bind(loop); 3328 __ movq(Address(rax, rdx, Address::times_8, 3329 sizeof(oopDesc) - oopSize), 3330 rcx); 3331 __ decrementl(rdx); 3332 __ jcc(Assembler::notZero, loop); 3333 } 3334 3335 // initialize object header only. 3336 __ bind(initialize_header); 3337 if (UseBiasedLocking) { 3338 __ movptr(rscratch1, Address(rsi, Klass::prototype_header_offset())); 3339 __ movptr(Address(rax, oopDesc::mark_offset_in_bytes()), rscratch1); 3340 } else { 3341 __ movptr(Address(rax, oopDesc::mark_offset_in_bytes()), 3342 (intptr_t) markOopDesc::prototype()); // header (address 0x1) 3343 } 3344 __ xorl(rcx, rcx); // use zero reg to clear memory (shorter code) 3345 __ store_klass_gap(rax, rcx); // zero klass gap for compressed oops 3346 __ store_klass(rax, rsi); // store klass last 3347 3348 { 3349 SkipIfEqual skip(_masm, &DTraceAllocProbes, false); 3350 // Trigger dtrace event for fastpath 3351 __ push(atos); // save the return value 3352 __ call_VM_leaf( 3353 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_object_alloc), rax); 3354 __ pop(atos); // restore the return value 3355 3356 } 3357 __ jmp(done); 3358 } 3359 3360 3361 // slow case 3362 __ bind(slow_case); 3363 __ get_constant_pool(c_rarg1); 3364 __ get_unsigned_2_byte_index_at_bcp(c_rarg2, 1); 3365 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::_new), c_rarg1, c_rarg2); 3366 __ verify_oop(rax); 3367 3368 // continue 3369 __ bind(done); 3370 } 3371 3372 void TemplateTable::newarray() { 3373 transition(itos, atos); 3374 __ load_unsigned_byte(c_rarg1, at_bcp(1)); 3375 __ movl(c_rarg2, rax); 3376 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::newarray), 3377 c_rarg1, c_rarg2); 3378 } 3379 3380 void TemplateTable::anewarray() { 3381 transition(itos, atos); 3382 __ get_unsigned_2_byte_index_at_bcp(c_rarg2, 1); 3383 __ get_constant_pool(c_rarg1); 3384 __ movl(c_rarg3, rax); 3385 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::anewarray), 3386 c_rarg1, c_rarg2, c_rarg3); 3387 } 3388 3389 void TemplateTable::arraylength() { 3390 transition(atos, itos); 3391 __ null_check(rax, arrayOopDesc::length_offset_in_bytes()); 3392 __ movl(rax, Address(rax, arrayOopDesc::length_offset_in_bytes())); 3393 } 3394 3395 void TemplateTable::checkcast() { 3396 transition(atos, atos); 3397 Label done, is_null, ok_is_subtype, quicked, resolved; 3398 __ testptr(rax, rax); // object is in rax 3399 __ jcc(Assembler::zero, is_null); 3400 3401 // Get cpool & tags index 3402 __ get_cpool_and_tags(rcx, rdx); // rcx=cpool, rdx=tags array 3403 __ get_unsigned_2_byte_index_at_bcp(rbx, 1); // rbx=index 3404 // See if bytecode has already been quicked 3405 __ cmpb(Address(rdx, rbx, 3406 Address::times_1, 3407 typeArrayOopDesc::header_size(T_BYTE) * wordSize), 3408 JVM_CONSTANT_Class); 3409 __ jcc(Assembler::equal, quicked); 3410 __ push(atos); // save receiver for result, and for GC 3411 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::quicken_io_cc)); 3412 __ pop_ptr(rdx); // restore receiver 3413 __ jmpb(resolved); 3414 3415 // Get superklass in rax and subklass in rbx 3416 __ bind(quicked); 3417 __ mov(rdx, rax); // Save object in rdx; rax needed for subtype check 3418 __ movptr(rax, Address(rcx, rbx, 3419 Address::times_8, sizeof(constantPoolOopDesc))); 3420 3421 __ bind(resolved); 3422 __ load_klass(rbx, rdx); 3423 3424 // Generate subtype check. Blows rcx, rdi. Object in rdx. 3425 // Superklass in rax. Subklass in rbx. 3426 __ gen_subtype_check(rbx, ok_is_subtype); 3427 3428 // Come here on failure 3429 __ push_ptr(rdx); 3430 // object is at TOS 3431 __ jump(ExternalAddress(Interpreter::_throw_ClassCastException_entry)); 3432 3433 // Come here on success 3434 __ bind(ok_is_subtype); 3435 __ mov(rax, rdx); // Restore object in rdx 3436 3437 // Collect counts on whether this check-cast sees NULLs a lot or not. 3438 if (ProfileInterpreter) { 3439 __ jmp(done); 3440 __ bind(is_null); 3441 __ profile_null_seen(rcx); 3442 } else { 3443 __ bind(is_null); // same as 'done' 3444 } 3445 __ bind(done); 3446 } 3447 3448 void TemplateTable::instanceof() { 3449 transition(atos, itos); 3450 Label done, is_null, ok_is_subtype, quicked, resolved; 3451 __ testptr(rax, rax); 3452 __ jcc(Assembler::zero, is_null); 3453 3454 // Get cpool & tags index 3455 __ get_cpool_and_tags(rcx, rdx); // rcx=cpool, rdx=tags array 3456 __ get_unsigned_2_byte_index_at_bcp(rbx, 1); // rbx=index 3457 // See if bytecode has already been quicked 3458 __ cmpb(Address(rdx, rbx, 3459 Address::times_1, 3460 typeArrayOopDesc::header_size(T_BYTE) * wordSize), 3461 JVM_CONSTANT_Class); 3462 __ jcc(Assembler::equal, quicked); 3463 3464 __ push(atos); // save receiver for result, and for GC 3465 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::quicken_io_cc)); 3466 __ pop_ptr(rdx); // restore receiver 3467 __ verify_oop(rdx); 3468 __ load_klass(rdx, rdx); 3469 __ jmpb(resolved); 3470 3471 // Get superklass in rax and subklass in rdx 3472 __ bind(quicked); 3473 __ load_klass(rdx, rax); 3474 __ movptr(rax, Address(rcx, rbx, 3475 Address::times_8, sizeof(constantPoolOopDesc))); 3476 3477 __ bind(resolved); 3478 3479 // Generate subtype check. Blows rcx, rdi 3480 // Superklass in rax. Subklass in rdx. 3481 __ gen_subtype_check(rdx, ok_is_subtype); 3482 3483 // Come here on failure 3484 __ xorl(rax, rax); 3485 __ jmpb(done); 3486 // Come here on success 3487 __ bind(ok_is_subtype); 3488 __ movl(rax, 1); 3489 3490 // Collect counts on whether this test sees NULLs a lot or not. 3491 if (ProfileInterpreter) { 3492 __ jmp(done); 3493 __ bind(is_null); 3494 __ profile_null_seen(rcx); 3495 } else { 3496 __ bind(is_null); // same as 'done' 3497 } 3498 __ bind(done); 3499 // rax = 0: obj == NULL or obj is not an instanceof the specified klass 3500 // rax = 1: obj != NULL and obj is an instanceof the specified klass 3501 } 3502 3503 //----------------------------------------------------------------------------- 3504 // Breakpoints 3505 void TemplateTable::_breakpoint() { 3506 // Note: We get here even if we are single stepping.. 3507 // jbug inists on setting breakpoints at every bytecode 3508 // even if we are in single step mode. 3509 3510 transition(vtos, vtos); 3511 3512 // get the unpatched byte code 3513 __ get_method(c_rarg1); 3514 __ call_VM(noreg, 3515 CAST_FROM_FN_PTR(address, 3516 InterpreterRuntime::get_original_bytecode_at), 3517 c_rarg1, r13); 3518 __ mov(rbx, rax); 3519 3520 // post the breakpoint event 3521 __ get_method(c_rarg1); 3522 __ call_VM(noreg, 3523 CAST_FROM_FN_PTR(address, InterpreterRuntime::_breakpoint), 3524 c_rarg1, r13); 3525 3526 // complete the execution of original bytecode 3527 __ dispatch_only_normal(vtos); 3528 } 3529 3530 //----------------------------------------------------------------------------- 3531 // Exceptions 3532 3533 void TemplateTable::athrow() { 3534 transition(atos, vtos); 3535 __ null_check(rax); 3536 __ jump(ExternalAddress(Interpreter::throw_exception_entry())); 3537 } 3538 3539 //----------------------------------------------------------------------------- 3540 // Synchronization 3541 // 3542 // Note: monitorenter & exit are symmetric routines; which is reflected 3543 // in the assembly code structure as well 3544 // 3545 // Stack layout: 3546 // 3547 // [expressions ] <--- rsp = expression stack top 3548 // .. 3549 // [expressions ] 3550 // [monitor entry] <--- monitor block top = expression stack bot 3551 // .. 3552 // [monitor entry] 3553 // [frame data ] <--- monitor block bot 3554 // ... 3555 // [saved rbp ] <--- rbp 3556 void TemplateTable::monitorenter() { 3557 transition(atos, vtos); 3558 3559 // check for NULL object 3560 __ null_check(rax); 3561 3562 const Address monitor_block_top( 3563 rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize); 3564 const Address monitor_block_bot( 3565 rbp, frame::interpreter_frame_initial_sp_offset * wordSize); 3566 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; 3567 3568 Label allocated; 3569 3570 // initialize entry pointer 3571 __ xorl(c_rarg1, c_rarg1); // points to free slot or NULL 3572 3573 // find a free slot in the monitor block (result in c_rarg1) 3574 { 3575 Label entry, loop, exit; 3576 __ movptr(c_rarg3, monitor_block_top); // points to current entry, 3577 // starting with top-most entry 3578 __ lea(c_rarg2, monitor_block_bot); // points to word before bottom 3579 // of monitor block 3580 __ jmpb(entry); 3581 3582 __ bind(loop); 3583 // check if current entry is used 3584 __ cmpptr(Address(c_rarg3, BasicObjectLock::obj_offset_in_bytes()), (int32_t) NULL_WORD); 3585 // if not used then remember entry in c_rarg1 3586 __ cmov(Assembler::equal, c_rarg1, c_rarg3); 3587 // check if current entry is for same object 3588 __ cmpptr(rax, Address(c_rarg3, BasicObjectLock::obj_offset_in_bytes())); 3589 // if same object then stop searching 3590 __ jccb(Assembler::equal, exit); 3591 // otherwise advance to next entry 3592 __ addptr(c_rarg3, entry_size); 3593 __ bind(entry); 3594 // check if bottom reached 3595 __ cmpptr(c_rarg3, c_rarg2); 3596 // if not at bottom then check this entry 3597 __ jcc(Assembler::notEqual, loop); 3598 __ bind(exit); 3599 } 3600 3601 __ testptr(c_rarg1, c_rarg1); // check if a slot has been found 3602 __ jcc(Assembler::notZero, allocated); // if found, continue with that one 3603 3604 // allocate one if there's no free slot 3605 { 3606 Label entry, loop; 3607 // 1. compute new pointers // rsp: old expression stack top 3608 __ movptr(c_rarg1, monitor_block_bot); // c_rarg1: old expression stack bottom 3609 __ subptr(rsp, entry_size); // move expression stack top 3610 __ subptr(c_rarg1, entry_size); // move expression stack bottom 3611 __ mov(c_rarg3, rsp); // set start value for copy loop 3612 __ movptr(monitor_block_bot, c_rarg1); // set new monitor block bottom 3613 __ jmp(entry); 3614 // 2. move expression stack contents 3615 __ bind(loop); 3616 __ movptr(c_rarg2, Address(c_rarg3, entry_size)); // load expression stack 3617 // word from old location 3618 __ movptr(Address(c_rarg3, 0), c_rarg2); // and store it at new location 3619 __ addptr(c_rarg3, wordSize); // advance to next word 3620 __ bind(entry); 3621 __ cmpptr(c_rarg3, c_rarg1); // check if bottom reached 3622 __ jcc(Assembler::notEqual, loop); // if not at bottom then 3623 // copy next word 3624 } 3625 3626 // call run-time routine 3627 // c_rarg1: points to monitor entry 3628 __ bind(allocated); 3629 3630 // Increment bcp to point to the next bytecode, so exception 3631 // handling for async. exceptions work correctly. 3632 // The object has already been poped from the stack, so the 3633 // expression stack looks correct. 3634 __ increment(r13); 3635 3636 // store object 3637 __ movptr(Address(c_rarg1, BasicObjectLock::obj_offset_in_bytes()), rax); 3638 __ lock_object(c_rarg1); 3639 3640 // check to make sure this monitor doesn't cause stack overflow after locking 3641 __ save_bcp(); // in case of exception 3642 __ generate_stack_overflow_check(0); 3643 3644 // The bcp has already been incremented. Just need to dispatch to 3645 // next instruction. 3646 __ dispatch_next(vtos); 3647 } 3648 3649 3650 void TemplateTable::monitorexit() { 3651 transition(atos, vtos); 3652 3653 // check for NULL object 3654 __ null_check(rax); 3655 3656 const Address monitor_block_top( 3657 rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize); 3658 const Address monitor_block_bot( 3659 rbp, frame::interpreter_frame_initial_sp_offset * wordSize); 3660 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; 3661 3662 Label found; 3663 3664 // find matching slot 3665 { 3666 Label entry, loop; 3667 __ movptr(c_rarg1, monitor_block_top); // points to current entry, 3668 // starting with top-most entry 3669 __ lea(c_rarg2, monitor_block_bot); // points to word before bottom 3670 // of monitor block 3671 __ jmpb(entry); 3672 3673 __ bind(loop); 3674 // check if current entry is for same object 3675 __ cmpptr(rax, Address(c_rarg1, BasicObjectLock::obj_offset_in_bytes())); 3676 // if same object then stop searching 3677 __ jcc(Assembler::equal, found); 3678 // otherwise advance to next entry 3679 __ addptr(c_rarg1, entry_size); 3680 __ bind(entry); 3681 // check if bottom reached 3682 __ cmpptr(c_rarg1, c_rarg2); 3683 // if not at bottom then check this entry 3684 __ jcc(Assembler::notEqual, loop); 3685 } 3686 3687 // error handling. Unlocking was not block-structured 3688 __ call_VM(noreg, CAST_FROM_FN_PTR(address, 3689 InterpreterRuntime::throw_illegal_monitor_state_exception)); 3690 __ should_not_reach_here(); 3691 3692 // call run-time routine 3693 // rsi: points to monitor entry 3694 __ bind(found); 3695 __ push_ptr(rax); // make sure object is on stack (contract with oopMaps) 3696 __ unlock_object(c_rarg1); 3697 __ pop_ptr(rax); // discard object 3698 } 3699 3700 3701 // Wide instructions 3702 void TemplateTable::wide() { 3703 transition(vtos, vtos); 3704 __ load_unsigned_byte(rbx, at_bcp(1)); 3705 __ lea(rscratch1, ExternalAddress((address)Interpreter::_wentry_point)); 3706 __ jmp(Address(rscratch1, rbx, Address::times_8)); 3707 // Note: the r13 increment step is part of the individual wide 3708 // bytecode implementations 3709 } 3710 3711 3712 // Multi arrays 3713 void TemplateTable::multianewarray() { 3714 transition(vtos, atos); 3715 __ load_unsigned_byte(rax, at_bcp(3)); // get number of dimensions 3716 // last dim is on top of stack; we want address of first one: 3717 // first_addr = last_addr + (ndims - 1) * wordSize 3718 __ lea(c_rarg1, Address(rsp, rax, Address::times_8, -wordSize)); 3719 call_VM(rax, 3720 CAST_FROM_FN_PTR(address, InterpreterRuntime::multianewarray), 3721 c_rarg1); 3722 __ load_unsigned_byte(rbx, at_bcp(3)); 3723 __ lea(rsp, Address(rsp, rbx, Address::times_8)); 3724 } 3725 #endif // !CC_INTERP